GITNUXSOFTWARE ADVICE
HR In IndustryTop 10 Best Holiday Tracking Software of 2026
How we ranked these tools
Core product claims cross-referenced against official documentation, changelogs, and independent technical reviews.
Analyzed video reviews and hundreds of written evaluations to capture real-world user experiences with each tool.
AI persona simulations modeled how different user types would experience each tool across common use cases and workflows.
Final rankings reviewed and approved by our editorial team with authority to override AI-generated scores based on domain expertise.
Score: Features 40% · Ease 30% · Value 30%
Gitnux may earn a commission through links on this page — this does not influence rankings. Editorial policy
Editor’s top 3 picks
Three quick recommendations before you dive into the full comparison below — each one leads on a different dimension.
Time Off Manager
Time-off request approvals with real-time calendar status and leave balance impact
Built for teams needing clear leave requests, approvals, and balances with minimal admin effort.
Breathe
Holiday request approval workflows tied to holiday allowances and balances
Built for hR-led teams needing policy-based holiday approvals and balance reporting.
Factorial
Leave request approvals with automated policy and balance validation
Built for hR-led teams needing PTO tracking inside broader workforce management.
Comparison Table
Use this comparison table to evaluate holiday tracking and time-off management tools across Time Off Manager, Factorial, Breathe, Kissflow HR, Zoho People, and other platforms. Review how each product handles leave requests, approvals, balances, reporting, and admin controls so you can compare feature depth and workflows side by side.
| # | Tool | Category | Overall | Features | Ease of Use | Value |
|---|---|---|---|---|---|---|
| 1 | Time Off Manager Tracks employee holiday requests, approvals, balances, and team calendars with automated workflows for leave management. | leave management | 9.1/10 | 8.9/10 | 9.0/10 | 8.3/10 |
| 2 | Factorial Manages vacation and absence tracking with configurable policies, approvals, and calendar views for HR teams. | HR absence | 8.2/10 | 8.6/10 | 7.9/10 | 7.8/10 |
| 3 | Breathe Provides holiday and absence tracking with employee self-service requests, approvals, and reporting. | HR platform | 8.1/10 | 8.6/10 | 7.6/10 | 8.0/10 |
| 4 | Kissflow HR Runs holiday and absence request workflows with approvals, status tracking, and audit visibility. | workflow automation | 8.1/10 | 9.0/10 | 7.6/10 | 7.4/10 |
| 5 | Zoho People Tracks employee leave and holidays with requests, approvals, balance management, and calendar reporting. | HR suite | 8.2/10 | 8.7/10 | 7.8/10 | 8.0/10 |
| 6 | Workable Supports PTO and holiday tracking workflows for teams through HR and operations modules alongside onboarding and employee administration. | HR operations | 7.3/10 | 7.6/10 | 7.2/10 | 7.0/10 |
| 7 | GreytHR Tracks employee attendance-linked leave and holiday management with self-service requests and approval controls. | HR payroll | 7.6/10 | 8.2/10 | 7.4/10 | 7.2/10 |
| 8 | OrangeHRM Manages leave and holiday requests with approval workflows, leave balances, and centralized HR administration. | HR leave | 7.6/10 | 8.2/10 | 7.2/10 | 7.4/10 |
| 9 | PeopleHum Centralizes leave and holiday requests with configurable approval flows, calendars, and reporting for HR teams. | HR leave | 7.6/10 | 7.4/10 | 7.9/10 | 7.3/10 |
| 10 | Sage HR Helps organizations track employee holidays and absences through HR management capabilities with configurable rules. | enterprise HR | 6.6/10 | 7.1/10 | 6.2/10 | 6.4/10 |
Tracks employee holiday requests, approvals, balances, and team calendars with automated workflows for leave management.
Manages vacation and absence tracking with configurable policies, approvals, and calendar views for HR teams.
Provides holiday and absence tracking with employee self-service requests, approvals, and reporting.
Runs holiday and absence request workflows with approvals, status tracking, and audit visibility.
Tracks employee leave and holidays with requests, approvals, balance management, and calendar reporting.
Supports PTO and holiday tracking workflows for teams through HR and operations modules alongside onboarding and employee administration.
Tracks employee attendance-linked leave and holiday management with self-service requests and approval controls.
Manages leave and holiday requests with approval workflows, leave balances, and centralized HR administration.
Centralizes leave and holiday requests with configurable approval flows, calendars, and reporting for HR teams.
Helps organizations track employee holidays and absences through HR management capabilities with configurable rules.
Time Off Manager
leave managementTracks employee holiday requests, approvals, balances, and team calendars with automated workflows for leave management.
Time-off request approvals with real-time calendar status and leave balance impact
Time Off Manager stands out for its focus on leave workflows with a calendar-first experience that keeps approvals and balances visible. It supports time-off request submission, manager approvals, and employee leave tracking in one place. The system is built for teams that need consistent policies and clear status updates across holidays, sick days, and vacation categories. Reporting helps admins track usage trends and capacity impact without manual spreadsheets.
Pros
- Calendar-driven requests make leave visibility fast for managers and staff
- Approval workflow keeps request status centralized and reduces email chasing
- Leave balance tracking supports multiple time-off categories for teams
Cons
- Advanced reporting depth can feel limited for complex HR governance needs
- Customization options for niche leave policies may require operational workarounds
- Setup for larger organizations with many groups can take more time
Best For
Teams needing clear leave requests, approvals, and balances with minimal admin effort
Factorial
HR absenceManages vacation and absence tracking with configurable policies, approvals, and calendar views for HR teams.
Leave request approvals with automated policy and balance validation
Factorial stands out for combining holiday tracking with workforce HR management, so PTO, leaves, and schedules live inside one system. It supports employee self-service holiday requests, approvals, and policy checks that help keep time off consistent. Role-based permissions and HR data context reduce the need for separate PTO tools and manual coordination.
Pros
- Holiday requests, approvals, and balances in one HR workflow
- Employee self-service reduces admin time for PTO changes
- Role-based permissions control who can approve and view requests
Cons
- Holiday tracking setup can be complex for small teams
- Full HR features can feel heavier than a pure PTO tool
- Configuring leave rules takes time and HR policy clarity
Best For
HR-led teams needing PTO tracking inside broader workforce management
Breathe
HR platformProvides holiday and absence tracking with employee self-service requests, approvals, and reporting.
Holiday request approval workflows tied to holiday allowances and balances
Breathe stands out with holiday and absence workflows built into an HR platform that also covers timesheets and employee HR data. It supports holiday request flows, holiday allowance tracking, and absence reporting for managers and HR administrators. Role-based permissions control who can view calendars, approve requests, and manage policy-driven balances. For holiday tracking, it favors process structure and auditability over highly custom frontline scheduling tools.
Pros
- Holiday request approvals integrate with a broader HR and attendance system
- Configurable holiday allowances and balance tracking reduce manual spreadsheet work
- Manager and HR views make absence reporting easier than generic calendar tools
- Role-based permissions support controlled access to employee leave data
Cons
- Holiday tracking setup takes time to configure policies, entitlements, and permissions
- Calendar views can feel less flexible than dedicated scheduling-first platforms
Best For
HR-led teams needing policy-based holiday approvals and balance reporting
Kissflow HR
workflow automationRuns holiday and absence request workflows with approvals, status tracking, and audit visibility.
Configurable workflow approvals for leave requests with automated routing and status changes
Kissflow HR stands out for building holiday workflows with configurable approvals instead of using only fixed leave forms. It supports holiday and leave requests with role-based approvals, automated status updates, and centralized employee leave tracking. The platform also connects HR data and processes so managers can view balances and request histories in one place. For holiday tracking, it works best when your leave logic needs custom routing, rules, and reporting.
Pros
- Configurable leave approval workflows with automated status tracking
- Role-based visibility for employees, managers, and HR administrators
- Centralized history and request records for audit-ready holiday tracking
- Workflow customization supports complex holiday policies
Cons
- Holiday tracking setup can require configuration and process design effort
- UI learning curve is higher than basic leave management tools
- Advanced reporting depends on how workflows and fields are modeled
- Cost can be high for small teams focused only on holiday requests
Best For
Organizations needing customizable holiday approvals and policy-driven leave workflows
Zoho People
HR suiteTracks employee leave and holidays with requests, approvals, balance management, and calendar reporting.
Leave policy management with automatic entitlement calculations and approval-driven leave requests
Zoho People stands out with its HR-suite foundation that turns holiday tracking into a workflow connected to attendance, leave balances, and approvals. You can set up leave policies, track employee entitlements, submit leave requests, and route them through manager approval. Admins can use role-based access and reporting to monitor leave usage and compliance across teams. The tool also supports integrations through Zoho’s ecosystem for identity and HR data synchronization.
Pros
- Configurable leave policies with entitlement tracking reduces manual holiday calculations
- Manager approval workflows help enforce holiday request consistency
- Leave usage reports support policy compliance across departments
- Zoho ecosystem integrations streamline HR data and employee onboarding
Cons
- Holiday tracking setup feels heavy for teams that only need basic leave lists
- Reporting customization can take time for non-admin users
- Approval routing complexity increases configuration effort in multi-policy workplaces
Best For
Mid-size teams managing multiple leave policies with approval workflows
Workable
HR operationsSupports PTO and holiday tracking workflows for teams through HR and operations modules alongside onboarding and employee administration.
Integrated leave request approvals tied to Workable employee and HR records
Workable stands out for combining holiday tracking inside a broader recruiting and HR workflow in one system. It supports employee leave requests with approvals, holiday calendars, and policy-aware leave balances to keep schedules consistent. You can also manage employee data that helps tie time off to role history and internal coordination. It is a strong fit when time off and HR processes matter together, but it is not the most holiday-centric option for complex shift-based workforce scheduling.
Pros
- Leave requests flow into an approval workflow with clear status visibility
- Holiday calendar and leave balance management reduces schedule conflicts
- Employee records can connect time off context to HR and recruiting history
Cons
- Holiday tracking lacks the deep shift and workforce scheduling tools of specialists
- HR and recruiting focus can feel heavy for teams only needing leave tracking
- Configuration complexity can increase admin effort during policy and balance setup
Best For
Companies using Workable for HR and recruiting who want built-in leave tracking
GreytHR
HR payrollTracks employee attendance-linked leave and holiday management with self-service requests and approval controls.
Leave and holiday policy configuration with automated approvals and balance tracking
GreytHR stands out with HR-wide workflow coverage that includes holiday and leave tracking alongside broader HR functions. It supports holiday calendars, leave requests, approvals, and balance management so employees can plan time off and managers can control approvals. Admins can configure leave policies and automate accrual-style tracking for attendance and leave workflows. The solution fits teams that want holiday tracking tightly connected to HR operations rather than a standalone calendar tool.
Pros
- Holiday and leave workflows connect directly to HR operations
- Configurable leave policies with manager approvals for controlled time off
- Centralized holiday calendars reduce manual tracking across teams
- Employee self-service supports request, view, and balance checks
Cons
- Setup for leave rules and calendars can require HR admin effort
- Reports feel less tailored for holiday-only use cases
- User experience can feel complex for small teams needing basics
- Limited standalone holiday features compared to dedicated calendars
Best For
Organizations needing holiday and leave workflows integrated into HR management
OrangeHRM
HR leaveManages leave and holiday requests with approval workflows, leave balances, and centralized HR administration.
Configurable leave accrual balances tied to approval workflows
OrangeHRM stands out for combining holiday tracking with full HR management modules in one system. It supports leave types, leave accrual and balances, approval workflows, and team calendars so managers can review requests quickly. The platform also includes employee directory, attendance, and policy fields that connect leave behavior to broader HR records. For holiday tracking specifically, its audit trails and configurable leave policies reduce manual coordination across locations.
Pros
- Leave types and balances with configurable accrual rules
- Approval workflows that route requests to the right managers
- Team calendar view helps track who is out
- Audit trails support compliance and history review
Cons
- User experience feels complex versus dedicated leave-only tools
- Reporting for leave patterns is less flexible than analytics-first platforms
- Setup of leave policies can take admin time
- Multi-location holiday logic may require careful configuration
Best For
HR teams using one system for leave, approvals, and employee records
PeopleHum
HR leaveCentralizes leave and holiday requests with configurable approval flows, calendars, and reporting for HR teams.
Approval workflow for holiday and leave requests with managerial sign-off
PeopleHum differentiates with built-in HR workflows focused on employee requests, approvals, and time off management rather than a standalone holiday calendar. It supports holiday and leave tracking with approval routing so managers can review and confirm time off requests. The system also centralizes employee data used for scheduling and HR operations, which reduces manual coordination across teams. Overall, it fits holiday tracking inside a broader HR workflow, not as a single-purpose scheduling tool.
Pros
- Holiday and leave requests include manager approvals in one workflow
- Employee profile data supports consistent HR operations alongside time off
- Centralized request handling reduces email-based holiday coordination
Cons
- Holiday tracking functions are less specialized than dedicated leave tools
- Reporting depth for holiday utilization appears less comprehensive
- Setup complexity can be higher for teams with simple holiday needs
Best For
HR teams managing approvals and time off workflows across multiple departments
Sage HR
enterprise HRHelps organizations track employee holidays and absences through HR management capabilities with configurable rules.
Absence and holiday tracking integrated with enterprise HR administration and reporting
Sage HR stands out with deep HR administration built for compliance-heavy organizations, which extends well to holiday tracking workflows. It supports holiday and absence management inside its broader HR suite, including employee records, scheduling interactions, and HR reporting needs. Holiday events can be maintained alongside other HR data, so HR teams avoid duplicating records in separate tools. Collaboration and approvals rely on the wider HR processes rather than a dedicated holiday portal built only for leave calendars.
Pros
- Holiday and absence data sits inside a full HR records model
- Supports HR reporting that can include leave trends and utilization
- Better suited to organizations needing compliance-friendly HR administration
Cons
- Holiday tracking is not a specialized leave-calendar product
- Setup and configuration can require HR process design and administration
- User experience can feel heavy for simple leave request needs
Best For
Organizations needing holiday tracking inside comprehensive HR administration processes
Conclusion
After evaluating 10 hr in industry, Time Off Manager stands out as our overall top pick — it scored highest across our combined criteria of features, ease of use, and value, which is why it sits at #1 in the rankings above.
Use the comparison table and detailed reviews above to validate the fit against your own requirements before committing to a tool.
How to Choose the Right Holiday Tracking Software
This buyer’s guide explains how to pick Holiday Tracking Software that handles requests, approvals, leave balances, and team visibility without breaking your HR workflow. It covers tools like Time Off Manager, Factorial, Breathe, Kissflow HR, Zoho People, Workable, GreytHR, OrangeHRM, PeopleHum, and Sage HR. Use this guide to map your approval complexity and reporting needs to the right product style.
What Is Holiday Tracking Software?
Holiday Tracking Software manages employee time off submissions for holidays, vacation, and absence types with approvals, balance tracking, and calendar or team visibility. It replaces email and spreadsheets by centralizing requests, approval status, and usage reporting so managers can see who is out. Teams that need policy enforcement often combine leave types and entitlements with workflow routing in tools like Time Off Manager and Factorial. HR-led organizations also use HR-suite platforms like Breathe and OrangeHRM to tie holiday requests into broader employee and absence management.
Key Features to Look For
The right feature set depends on whether your holiday process is simple calendar requests or policy-driven approvals tied to balances and governance.
Calendar-first leave requests with real-time status
Time Off Manager uses a calendar-driven leave request experience so managers can see request status and leave balance impact quickly. This approach reduces back-and-forth because approval outcomes and calendar placement are tied together.
Automated policy and balance validation during approvals
Factorial and Breathe validate leave rules and entitlements as part of the approval workflow so requests align with configured balances. GreytHR also supports policy configuration with automated approval controls and balance checks for attendance-linked leave workflows.
Configurable approval routing and workflow status changes
Kissflow HR supports configurable workflow approvals that route requests and update status automatically for complex holiday policies. PeopleHum also focuses on approval routing with managerial sign-off so time off confirmations stay centralized.
Leave balance and entitlement management across multiple leave categories
Time Off Manager tracks leave balances across multiple time-off categories so teams can manage vacation and other absence types consistently. Zoho People and OrangeHRM provide configurable leave policies with entitlement calculations and leave accrual balances tied to approval workflows.
Role-based access across employees, managers, and HR administrators
Factorial and Breathe use role-based permissions to control who can view calendars, approve requests, and access policy-driven balances. Kissflow HR and OrangeHRM also support role-based visibility so employee history and leave data remain controlled.
Audit-ready request history and compliance-oriented reporting views
Kissflow HR centralizes request history for audit-ready holiday tracking with automated status and record keeping. OrangeHRM and Sage HR emphasize audit trails and compliance-friendly HR administration so holiday data sits inside broader HR records and reporting.
How to Choose the Right Holiday Tracking Software
Pick the tool whose workflow model matches your leave rules, approval complexity, and reporting expectations.
Start with your approval complexity and policy rules
If your team needs consistent approvals with minimal admin overhead, choose Time Off Manager because it centralizes approvals with real-time calendar status and leave balance impact. If your leave rules vary by policy and require automated policy checks during approvals, Factorial and Breathe validate leave rules and balances as part of the approval workflow.
Decide whether you need HR-suite integration or a leave workflow-first tool
If you want holiday tracking tightly inside broader workforce or HR modules, Factorial, Breathe, and GreytHR connect holiday requests to HR operations and employee context. If you want leave management that is calendar-first and focused on request status and balance impact, Time Off Manager fits teams that want a leave portal experience rather than a full HR suite.
Validate balance and entitlement coverage for your leave categories
If you manage multiple leave categories, Time Off Manager supports leave balance tracking across categories. If your organization relies on entitlements and accrual rules, Zoho People and OrangeHRM provide configurable leave policies with entitlement calculations and leave accrual balances tied to approval routing.
Match configuration effort to your internal HR process design capability
If you can handle workflow and policy design work, Kissflow HR supports configurable routing and complex leave logic through workflow modeling. If you need faster setup for a holiday-request workflow with fewer HR design dependencies, Time Off Manager keeps approvals and calendar visibility centralized without requiring extensive workflow process design.
Plan for the reporting depth you will actually use
If you need audit-ready request history and compliance-oriented tracking, Kissflow HR centralizes history and OrangeHRM offers audit trails. If you need HR-suite reporting that includes leave trends inside enterprise HR administration, Sage HR integrates holiday and absence data into its broader HR reporting.
Who Needs Holiday Tracking Software?
Holiday Tracking Software fits organizations where unmanaged leave requests create scheduling conflicts, policy inconsistencies, and hard-to-audit records.
Teams that want clear employee requests, approvals, and balances with minimal admin effort
Time Off Manager is built for teams that need leave requests and approvals visible on a calendar with real-time balance impact. Its automated workflow helps reduce manual chasing while keeping approval status centralized for managers and employees.
HR-led teams that need PTO tracking inside broader workforce or HR management
Factorial and Breathe combine holiday requests with HR workflows so policy checks and balance validation happen during approvals. These tools also use role-based permissions to control access to calendars, approvals, and balances in one place.
Organizations with complex leave logic that needs custom approval routing and audit history
Kissflow HR supports configurable workflow approvals with automated routing and status changes for complex holiday policies. It also centralizes request records for audit-ready holiday tracking and history review.
Multi-department HR teams managing entitlements, accruals, and multi-policy approval workflows
Zoho People targets mid-size teams that manage multiple leave policies and need automatic entitlement calculations and approval-driven requests. GreytHR and OrangeHRM are also strong choices when holiday approvals must connect to broader HR operations, accrual balances, and manager review.
Common Mistakes to Avoid
Common failures come from choosing workflow models that do not match your policy complexity or from underestimating setup and reporting configuration needs.
Overbuying a workflow builder when your leave process needs a simple approval-and-calendar flow
Kissflow HR supports complex customizable routing and requires process design effort, so it can be heavier than necessary for basic leave request lists. Time Off Manager focuses on calendar-driven requests with centralized approvals and real-time balance impact to avoid extra workflow modeling.
Ignoring policy and balance validation requirements
Factorial and Breathe validate policy and balances during approvals, so they fit teams that need enforceable leave rules. Tools that emphasize approvals without strong policy-driven validation can lead to inconsistent entitlements when requests exceed balances, which is why these automated validation-oriented products matter.
Underestimating configuration effort for multi-policy or entitlement setups
Breathe, Factorial, Zoho People, GreytHR, and OrangeHRM all require configuration of policies, entitlements, and permissions, which takes time for teams with unclear HR rules. If your internal HR policy definitions are not ready, you will spend more effort aligning leave rules than running day-to-day approvals.
Expecting holiday-only reporting depth from HR-suite tools without designing how data is modeled
Kissflow HR reporting depth depends on how workflows and fields are modeled, which can limit holiday-only analytics if you do not structure request data carefully. Time Off Manager can feel limited for complex HR governance reporting depth, so teams with heavy governance needs should plan how they will use reporting outputs in their governance process.
How We Selected and Ranked These Tools
We evaluated the holiday tracking tools by overall capability for managing holiday and absence requests plus the practical strength of features, ease of use, and value for leave workflow operations. We prioritized tools that connect requests to approvals, balances, and team visibility so managers can act without chasing updates. Time Off Manager separated itself by combining a calendar-first workflow with real-time approval status and leave balance impact, which reduces administrative overhead in day-to-day leave management. Lower-ranked options often leaned more heavily on broader HR administration without becoming specialized enough for simple holiday calendar operations or required more time for workflow and policy configuration to reach a usable state.
Frequently Asked Questions About Holiday Tracking Software
Which holiday tracking tool is best when approvals must update in real time on a calendar view?
Time Off Manager is built with a calendar-first workflow that shows approval status alongside leave balance impact. Factorial and Breathe also support approval flows, but they sit inside broader HR contexts rather than a standalone calendar-first leave experience.
Which option enforces leave policies and entitlement validation during request submission?
Factorial validates leave requests against HR policy and balance data at approval time. Zoho People performs leave policy management and entitlement calculations so admins can route requests with compliance-oriented balances.
What should HR teams choose if they need holiday allowances and absence reporting tied to approvals?
Breathe combines holiday request flows with holiday allowance tracking and absence reporting for managers and HR administrators. GreytHR also links policy configuration to automated approvals and balance management across HR operations.
Which tools support configurable approval routing instead of fixed leave forms?
Kissflow HR uses configurable workflow approvals so you can route leave requests based on rules and roles. GreytHR and OrangeHRM support approval workflows too, but Kissflow HR is the more explicit fit when routing logic needs customization beyond standard approval chains.
Which holiday tracking software is strongest for consolidating time off with broader workforce or recruiting data?
Workable ties leave request approvals to employee records and HR workflow context inside the same system. Factorial and GreytHR also centralize HR workflows, but Workable is geared toward companies already running HR and recruiting processes there.
What tool is best when you need leave requests connected to employee attendance, timesheets, and HR records?
Breathe supports holiday and absence workflows alongside timesheets and HR data. OrangeHRM connects leave types, accrual, approvals, and team calendars to employee directory and attendance-linked context.
Which platforms handle leave history and balance reporting with audit-friendly workflows?
Breathe favors process structure with role-based permissions and balance reporting tied to holiday allowances. OrangeHRM includes audit trails and configurable leave policies, and Kissflow HR centralizes request history within workflow-driven status updates.
What is the best starting point if you want holiday tracking inside a single HR suite without duplicating employee records?
Sage HR is designed for enterprise HR administration, so holiday and absence management live alongside employee records and HR reporting. Sage HR and OrangeHRM both reduce duplicated records by keeping holiday events within the same administrative system.
How do you compare standalone holiday workflow strength versus HR-wide workflow integration?
Time Off Manager and GreytHR emphasize holiday and leave workflows with clear approvals and balances inside their HR-oriented processes. Factorial, Breathe, OrangeHRM, and Sage HR go further by embedding holiday tracking into wider HR modules like policies, attendance context, and broader reporting.
Tools reviewed
Referenced in the comparison table and product reviews above.
Keep exploring
Comparing two specific tools?
Software Alternatives
See head-to-head software comparisons with feature breakdowns, pricing, and our recommendation for each use case.
Explore software alternatives→In this category
HR In Industry alternatives
See side-by-side comparisons of hr in industry tools and pick the right one for your stack.
Compare hr in industry tools→FOR SOFTWARE VENDORS
Not on this list? Let’s fix that.
Every month, thousands of decision-makers use Gitnux best-of lists to shortlist their next software purchase. If your tool isn’t ranked here, those buyers can’t find you — and they’re choosing a competitor who is.
Apply for a ListingWHAT LISTED TOOLS GET
Qualified Exposure
Your tool surfaces in front of buyers actively comparing software — not generic traffic.
Editorial Coverage
A dedicated review written by our analysts, independently verified before publication.
High-Authority Backlink
A do-follow link from Gitnux.org — cited in 3,000+ articles across 500+ publications.
Persistent Audience Reach
Listings are refreshed on a fixed cadence, keeping your tool visible as the category evolves.