Time & Date Tools

Time & Date Calculators

16+ free time and date tools. World clock, age calculator, timezone converter, countdown timers and more. Always accurate, no signup.

16+
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Why Use Our Time & Date Calculators

Time calculations are surprisingly tricky to do manually. The number of business days between two dates changes with weekends and public holidays. Age calculation seems simple until you hit leap years and edge cases around February 29. How many hours you have worked across irregular shifts requires careful arithmetic. Our tools handle all of this automatically.

Use the World Clock for live times across 400+ cities, the Timezone Converter to plan international meetings, and the Business Days Calculator to find exact deadlines excluding weekends. The Countdown Timer works for everything from exam preparation to product launches.

The Age Calculator gives exact years, months, and days. The Work Hours Calculator handles overnight shifts and breaks. The Unix Timestamp Converter is essential for developers working with APIs and databases.

All tools run in your browser. No data is stored. Results update instantly.

Time & Date Questions
Common questions about time zones, date calculations, leap years and countdowns.
How many days are there between two dates?
Subtract the earlier date from the later date. From January 1 to December 31 is 364 days in a regular year and 365 in a leap year. From March 15 to September 15 is exactly 184 days. Use the Days Between Dates Calculator for any two dates instantly.
What time zone should I use for a meeting across multiple countries?
London: UTC+1 summer (BST), UTC+0 winter (GMT). New York: UTC-4 summer (EDT), UTC-5 winter (EST). Tokyo: always UTC+9. A 9am New York meeting is 2pm London and 10pm Tokyo. Use the Meeting Time Planner to find an overlap for all cities simultaneously.
How do I calculate my exact age in days?
Multiply your years by 365, add one day per leap year since your birth, then add the remaining days since your last birthday. A person born March 1, 2000 is approximately 9,575 days old as of May 2026. Use the Age Calculator which shows exact age in years, months, days, hours, minutes and seconds in real time.
How many business days are in a month?
A standard month has 20 to 23 business days depending on how many weekends fall in it and whether any public holidays apply. January typically has 21 working days, February has 19 or 20. Use the Business Days Calculator to count working days between any two specific dates.
What is the difference between UTC and GMT?
GMT (Greenwich Mean Time) is a time zone used by the UK in winter. UTC (Coordinated Universal Time) is the global scientific standard that all other zones are offset from. They show the same time but UTC is not a time zone. The UK switches to BST (UTC+1) in summer. Use the Time Zone Converter for any UTC offset.
How do I convert a Unix timestamp to a readable date?
A Unix timestamp counts seconds elapsed since January 1, 1970 00:00:00 UTC (the Unix epoch). Timestamp 1,700,000,000 equals November 14, 2023 at 22:13:20 UTC. Use the Unix Timestamp Converter for instant two-way conversion between epoch time and human-readable dates.
Is 2026 a leap year?
No, 2026 is not a leap year. Leap years occur every 4 years: the next ones are 2028 and 2032. A year is a leap year if divisible by 4, except century years which must also be divisible by 400. So 2000 was a leap year but 1900 was not. Use the Leap Year Calculator to check any year instantly.
How do I calculate how many weeks until an event?
Subtract today's date from the target date and divide by 7. From May 18, 2026 to December 25, 2026 is 221 days = 31 weeks and 4 days. Use the Countdown Timer which shows days, hours, minutes and seconds remaining until any date you set, updating in real time.
What time is it in a different country right now?
Time zones range from UTC-12 to UTC+14. Major cities: New York UTC-4/-5, London UTC+0/+1, Dubai UTC+4, Singapore UTC+8, Sydney UTC+10/+11, Tokyo UTC+9. Use the World Clock to see current local time for any city worldwide.
How do I calculate work hours for a timesheet?
Subtract your start time from end time for each day, subtract unpaid breaks, then add all days together. Example: 9:00am to 5:30pm minus 30 minutes lunch = 8 hours. Five such days = 40 hours weekly. Use the Work Hours Calculator to enter daily times and get weekly totals automatically.
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