Time & Dates

Unix timestamps, ISO week numbers, ages, durations and "now".

Timestamp or date

Accepted: a Unix number in seconds or milliseconds (below 10^11 it is seconds), an ISO 8601 date, YYYY-MM-DD read as midnight UTC, or something strtotime() understands such as +3 days or last monday. Empty means "now".

Timezone

Compare with

Difference against the timezone above, right now.

Shift by

Negative shifts backwards. Zero means no shift.

Unit

Interval from

Both ends are needed for the interval; anything strtotime() reads works here too.

Interval to

A date without a time is midnight UTC, not midnight local: two people in two timezones should see the same instant.

Nothing yet: paste a timestamp and press the button.

What to watch for.

Natural-language dates are whatever PHP's parser thinks, so an ambiguous "03/04/2026" is not guaranteed to mean 3 April. A bare number below 100,000,000,000 is read as seconds and anything above as milliseconds, and the timezone database is the one shipped with PHP, not a live service.