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Time utils

note

This functionality is available on Tweak Basic and Tweak Max. Compare the plans here.

Time utils is one field that understands the times developers paste around: Unix timestamps, ISO dates, date math, durations and cron expressions. Type or paste one and it answers in every format you are likely to need.

Using it​

  1. Open the toolbox and click the hourglass.
  2. Type or paste into the field. The title says what your input was read as.
  3. Click any row of the answer to copy it.
  4. Left empty, the field shows the current time, ticking.

What it reads:

You typeIt answers
a timestamp or a date (1767225600, ISO)UTC, Unix seconds and ms, HTTP date, local, relative, the week
date math (now-7d/d, now+1M)the resulting date, in all the formats above
a duration (90m, PT1H)seconds, ms, ISO 8601, when it expires from now
two dates (a .. b, a to b)the time between them, exact and in calendar days
a cron expression (0 9 * * 1-5)its next five runs
several linesthe same values, sorted

Example: what is this timestamp?​

Paste 1767225600 from a log or a payload. Ten digits read as seconds, and the answer is midnight UTC on January 1, 2026, with the millisecond reading it would have had underneath.

Time utils reading 1767225600 as Unix seconds, with UTC, HTTP date, local and relative rows

Example: when does this cron job run?​

Paste 0 9 * * 1-5 and get the next five runs: every weekday at 09:00.

Time utils listing the next five runs of 0 9 * * 1-5, Monday to Friday at 09:00

Good to know​

  • Times are shown in the page's time zone, so they follow the time zone override. A UTC switch shows them in UTC instead, unless the page already runs in UTC.
  • Notes under the answer flag the traps: a timestamp that could be seconds or milliseconds, a date without a time zone, a daylight saving change inside a duration or a cron schedule.
  • Cron expressions use the standard five fields.
  • Nothing you type is saved.

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