One month ago on this site is 30 days, not “the same date last month”. That is the right tool for a rough 30-day lookback and the wrong tool for “March 3rd last month” — use the difference calculator with two dates for a named calendar day.

How 1 month ago is calculated

The page subtracts 30 × 24 hours from your current local time. February and 31-day months are not special-cased. The disclaimer on this site says so on purpose.

Calendar months vs 30 days

If you need the same calendar date last month, pick both datetimes on the time difference page. For four weeks, use 4 weeks ago.

Browse hours ago, minutes ago, from now, or the guides if you need the method instead of a single offset.

Questions about 1 month ago

How accurate is “What time was it 1 month ago?”?

The page uses your device clock and timezone. If that clock is correct, 1 month ago is exact. Refresh and the answer moves with now.

Can I get the future version of 1 month?

Yes. Switch the direction in the URL between ago and from-now, or use the calculator on the homepage.

Why is there a UTC grid?

The grid shows the same instant as 1 month ago in other UTC offsets, so you can compare with someone in another region.

What time was it 1 month ago?

UTC Timezones

Related offsets

Common Reference