Working Days Calculator with Auto-Save

Calculate the number of working (business) days and hours for any year with our advanced interactive calendar. Features automatic saving, bulk day settings, customizable work schedules, and persistent storage. Perfect for payroll calculations, project planning, and business scheduling. No Signup Required.

Working time calendar 2025

SuMoTuWeThFrSaSuMoTuWeThFrSaSuMoTuWeThFrSaSuMoTuWeThFrSaSuMoTuWeThFrSaSuMoTuWeThFrSaMonthly
Days
HoursQuarterly
Days
Hours

Working time by color:

8 h
12 h
4 h
Non-working

Set every:

to:

How to Use the Working Days Calculator

📅 Basic Setup

  1. Select the year you want to calculate
  2. Toggle federal holidays on/off as needed
  3. Set calendar start/end months if needed
  4. Choose first day of week preference
  5. All settings auto-save automatically

🎯 Custom Days

  1. Click any date to cycle working hours
  2. Options: 0h, 4h, 8h, 12h per day
  3. Colors show different hour types
  4. Custom settings are saved instantly
  5. Use reset buttons to clear changes

⚡ Bulk Settings

  1. Select weekday checkboxes (Su, Mo, etc.)
  2. Choose working hours from dropdown
  3. Click Apply to set all instances
  4. Perfect for shift schedules
  5. Changes apply to entire year

Advanced Features

💾 Auto-Save

  • Automatic local storage
  • Settings persist between sessions
  • No data loss on refresh
  • Instant save on changes
  • Privacy-focused (local only)

🎨 Interactive Calendar

  • Click to cycle working hours
  • Color-coded day types
  • Visual working patterns
  • Instant visual feedback
  • Hover tooltips with details

⚙️ Bulk Operations

  • Set multiple weekdays at once
  • Apply to entire year
  • Perfect for shift schedules
  • Flexible hour options
  • Clear selection after apply

📊 Smart Analytics

  • Real-time calculations
  • Monthly breakdowns
  • Quarterly summaries
  • Color-coded statistics
  • Total hours tracking

Perfect For

💰 Payroll & HR

  • Annual salary calculations
  • Hourly wage planning
  • Overtime budgeting
  • Benefits calculations
  • Compliance reporting
  • Multi-year comparisons

📈 Project Management

  • Timeline planning
  • Resource allocation
  • Sprint planning
  • Milestone scheduling
  • Capacity planning
  • Deadline calculations

🏢 Business Operations

  • Shift scheduling
  • Service planning
  • Contract calculations
  • Budget forecasting
  • Operational planning
  • Fiscal year planning

Pro Tips & Best Practices

✅ Best Practices

  • Use bulk settings for recurring patterns
  • Mark company-specific holidays individually
  • Set up different configurations for different teams
  • Use 4h setting for half-day holidays
  • Leverage auto-save for multiple scenarios
  • Use custom date ranges for fiscal years

💡 Advanced Tips

  • 12h setting perfect for overtime planning
  • Toggle federal holidays for international use
  • Use Reset Calendar to try different scenarios
  • Color legend helps identify patterns quickly
  • Settings persist across browser sessions
  • Quarterly data useful for reporting

Privacy & Data Storage

🔒 Your Data Stays Private

All your settings and custom configurations are stored locally in your browser using localStorage. No data is sent to our servers, ensuring complete privacy and security.

  • Data never leaves your device
  • No account registration required
  • Works completely offline after initial load
  • Clear data anytime with "Reset All" button

Smart Insights

Business Impact

Accurate working day calculations are crucial for business operations. A typical year has approximately 260-262 working days, but this varies significantly based on holidays, company policies, and shift schedules.

With auto-save functionality, teams can maintain consistent calculations across different scenarios, ensuring accuracy in payroll, project planning, and resource allocation.

The bulk settings feature is particularly valuable for organizations with complex shift patterns, allowing quick setup of recurring schedules that would be time-consuming to configure manually.

Advanced Features

The calculator's flexible hour system (0h, 4h, 8h, 12h) accommodates various work arrangements: part-time schedules, overtime planning, half-day holidays, and compressed work weeks.

Local storage ensures your configurations persist across sessions, making it ideal for ongoing projects or recurring calculations. No need to reconfigure settings each time you use the tool.

The visual calendar interface with color coding makes it easy to spot patterns and verify configurations at a glance, reducing errors in complex scheduling scenarios.

Frequently Asked Questions

How does the working days calculator work?

The calculator automatically counts Monday through Friday as working days and weekends as non-working days. You can customize any date by clicking on it to cycle through different working hours (0h, 4h, 8h, 12h). The tool calculates total working days and hours for the entire year, broken down by month and quarter. All your settings are automatically saved to your browser's local storage.

Does the calculator save my custom settings?

Yes! The calculator automatically saves all your settings including custom day configurations, selected year, working hours preferences, calendar range, and federal holiday settings to your browser's local storage. Your data persists between sessions, so you can close and reopen the page without losing your work.

Can I customize which days are considered working days?

Absolutely! Click on any date in the calendar to cycle through working hours: 0h (non-working), 4h (half day), 8h (full day), or 12h (overtime). You can also use the bulk settings feature to apply working hours to all instances of specific weekdays (e.g., mark all Saturdays as 4-hour working days).

How do I use the bulk day settings feature?

Select the checkboxes for the days of the week you want to modify (Su, Mo, Tu, etc.), choose the working hours from the dropdown (0h, 4h, 8h, or 12h), and click Apply. This will set all instances of those weekdays throughout the year to your chosen working hours. It's perfect for setting up shift schedules or marking recurring working patterns.

What happens if I want to reset my settings?

There are two reset options: 'Reset Calendar' only clears your custom day settings while keeping other preferences, and 'Reset All' returns everything to default values and clears all saved data from local storage. Your settings are automatically saved, so any changes take effect immediately.

Can I use this for payroll calculations?

Absolutely! This tool is perfect for payroll departments to calculate total working days and hours for any year. The monthly and quarterly breakdowns help with payroll planning, budgeting, and compliance reporting. The auto-save feature ensures your payroll configurations are preserved for future reference.

How are federal holidays handled?

The calculator includes US federal holidays for 2025 by default, which you can toggle on/off. When enabled, federal holidays are automatically marked as non-working days (0 hours). You can still manually override any holiday by clicking on it if your organization works on federal holidays.

Can I set different calendar date ranges?

Yes! You can customize both the start and end months for your calendar view. This is useful for fiscal years, academic years, or project-specific timeframes. For example, you could set it to show April through March for a fiscal year calendar. These settings are automatically saved.

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