Plan schedules, compare dates, and convert clocks for travel, work, and everyday planning. Each tool documents assumptions such as time zones and calendar rules.
Compute exact years, months, and days between a birth date and a reference date using calendar arithmetic.
Find the whole-day difference between a start date and end date using UTC midnight boundaries.
Apply Gregorian leap-year rules to any year from 1 to 9999 and see yes or no instantly.
Find Gregorian Easter Sunday and related movable feast dates for any year.
Calculate Julian calendar Easter Sunday and linked movable feast dates by year.
Turn calendar dates and times into Unix epoch timestamp values.
Select a time and start a countdown by clicking the start button, easily and online
Find elapsed days, weeks, months, and years between two calendar dates with optional direction.
Convert Unix epoch seconds into human-readable local date and time.
Discover your national holidays with this online simulator. Fill in with your country and click on the start button
Convert the time using different time zones
Enter distance and average speed to calculate the estimated travel time for your trip.