Subtract Months
What date was N months ago?
Months taken off on the calendar, with the shorter-month case clamped and stated — and a warning that month arithmetic does not reverse cleanly.
Questions people ask
The things that come up about subtract monthss, answered plainly.
Why does adding a month and subtracting one not return me to the start?
Because clamping loses information. 31 March minus one month is 28 February; adding a month back gives 28 March, not the 31st. Every date library behaves this way, and it is worth knowing before you build a billing schedule on it.
Related tools
Move a date forwards or backwards by a span, with the calendar's rules applied.
Add Months to DateMonths added on the calendar, with the end-of-month case handled explicitly — 31 January plus one month is 28 February, and the page says so rather than silently landing in March.
Subtract YearsYears taken off a date, with leap-day clamping, the weekday, and the age that span would make someone.
Months Between DatesWhole calendar months and the days left over — worked out by walking the calendar, so the answer matches what a lease, a loan schedule or a notice period means by "a month".
Past Date CalculatorCount backwards from today by any span — days, weeks, months or years — and get the date with its weekday and week number.