Date and Time Calculators
How old are you exactly, how many days until the holiday, what date is 90 days from now, what time is it in New York? Everything to do with calendars and clocks.
- Age CalculatorPick your date of birth to see your exact age in years, months and days.
- Days CalculatorPick two dates to see the number of days, weeks and working days between them.
- Date CalculatorPick a date and enter how much time to add; see the date it lands on.
- Week CalculatorPick a date to see which week and day of the year it falls on.
- Time CalculatorEnter a start and end time to see the duration in hours and minutes.
- Time Zone ConverterEnter a time and choose two cities to see what time it is on the other side.
How do you count the days between two dates?
The days between two dates are the difference on the calendar; months of 28, 30 and 31 days and leap years make counting by hand error-prone.
The days calculator gives the gap in days, weeks and working days, the age calculator in years, months and days, and the date calculator the date a given period from now.
What week is it, and what is the time difference?
Week numbers follow ISO 8601: weeks start on Monday and week 1 contains the year’s first Thursday. Time differences between cities change during the year with daylight saving time.
The week calculator gives the week number, the time calculator the duration between two times, and the time zone converter the time in another city with daylight saving applied.
Frequently Asked Questions
Are public holidays excluded from working days?
No, only Saturdays and Sundays are removed; subtract public holidays yourself.
Where does today’s date come from?
Date fields fill in today’s date from your device’s clock.