WHAT DATE IS A DURATION FROM A GIVEN DATE?

You get to enter a date and a duration, and out shall come whatever date is that duration from the date you entered! Positive durations are after the date, and negative durations are before the date. You may enter your duration in terms of the options below. You may type as many decimals as you please, but know that the result will be rounded down to the day.

It'll even show you what events happened in that time!