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Popular Date & Time Calculators
Days Between Dates
Calculate the exact number of days between any two dates. Perfect for project planning, age calculation, or countdown to events.
Use Calculator →Business Days Calculator
Calculate working days between dates, excluding weekends. Essential for project deadlines and business planning.
Use Calculator →Week Number Calculator
Find the week number for any date or calculate dates from week numbers. Useful for fiscal planning and project scheduling.
Use Calculator →Time Zone Converter
Convert times between different time zones instantly. Perfect for scheduling international meetings and events.
Use Calculator →Date Add/Subtract
Add or subtract days, weeks, months, or years from any date. Ideal for deadline calculations and future date planning.
Use Calculator →Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. Essential for developers and system administrators.
Use Calculator →Common Use Cases
Project Planning
- Calculate project deadlines
- Determine milestone dates
- Plan sprints and iterations
- Schedule team meetings across time zones
Business Operations
- Calculate payment due dates
- Plan delivery schedules
- Set meeting times across time zones
- Track business days for contracts
Personal Planning
- Count days until events
- Plan travel itineraries
- Calculate ages and anniversaries
- Schedule appointments
Frequently Asked Questions
How do I calculate business days between two dates?
Our Business Days Calculator automatically counts weekdays (Monday-Friday) between your chosen dates, excluding weekends. Simply enter your start and end dates, and we'll do the calculation for you.
What is a Unix timestamp?
A Unix timestamp is the number of seconds that have elapsed since January 1, 1970 (midnight UTC/GMT). It's widely used in computer systems and programming for tracking time.
How are week numbers calculated?
Week numbers are calculated according to ISO 8601 standards. The first week of the year is the week that contains January 4th. Weeks start on Monday and end on Sunday.
How accurate are the calculations?
All our calculations are precise to the second and follow international standards. We account for leap years, daylight saving time changes, and time zone differences where applicable.
Can I use these calculators for business purposes?
Yes! Our calculators are free to use for both personal and business purposes. They're especially useful for project planning, scheduling, and deadline calculations.
Tips for Using Our Calculators
For Business Planning
- Always account for holidays in business day calculations
- Use UTC times for international deadlines
- Consider using week numbers for fiscal planning
- Double-check time zones for global meetings
For Personal Use
- Save important dates for quick reference
- Use the countdown feature for events
- Consider daylight saving time changes
- Share calculated dates with others