Date & Time Computations

Explore astronomical, historical and other data for specific dates and times.

Find out the current date and time:

Get facts about a date:

Perform complex computations and arithmetic with dates.

Add and subtract dates and times:

Specify a date by its place on the calendar:

Do computations with birth dates and other data:

Compute the time between any two dates or time specifications.

Calculate a length of time: