Past Date Calculator
What date was it?
Count backwards from today by any span — days, weeks, months or years — and get the date with its weekday and week number.
Questions people ask
The things that come up about past date calculators, answered plainly.
What date was 6 months ago?
The tool walks the calendar rather than subtracting 180 days, so the answer is the same day-of-month six months back — clamped if that month is shorter.
How do I find a records cutoff?
Enter the retention period — 7 years, 90 days, 18 months — and the result is the earliest date still inside it. Anything before that date is out of scope.
Related tools
Move a date forwards or backwards by a span, with the calendar's rules applied.
Future Date CalculatorCount forward from today by any span and get the date, its weekday, its week number, and how many working days away it is.
Subtract DaysDays taken off a date, with the weekday, and the working-day answer beside it for anything counted backwards from a deadline.
Date Offset CalculatorOne field for the whole offset — `2y 3mo 10d`, `+6 weeks`, `-90 days` — applied in calendar order, with each step shown so you can see what happened.
Date Difference CalculatorEnter two dates and get the gap in every unit at once — years, months and days as a person would say it, and the exact total in weeks, hours, minutes and seconds underneath.