Turn a Unix timestamp into a readable date on your Mac

Nobody can read an epoch, and everybody pretends otherwise

1753189200 is a moment in time. You can tell it is roughly “the mid-2020s” from the leading digits, and that is the whole of what human pattern-matching gets you. Whether the incident started before or after the deploy — the actual question — needs arithmetic you are not going to do in your head at 11pm.

So there is a converter site with an ad for a VPN on it, or there is date -r 1753189200, which works and requires a terminal and gives you one format. Neither answers the follow-up question, which is always the same one: yes, but in UTC? Server logs are UTC, your calendar is not, and half of debugging a timeline is holding both in your head at once.

And then there is the sub-genre of the problem: was that seconds or milliseconds? Thirteen digits pasted into a tool expecting ten gives you a date in the year 57000, which at least announces itself. Ten digits into a tool expecting thirteen gives you 1970, which also announces itself. The failures in between are the ones that cost an hour.

Both directions, both units

Rakkun recognizes Unix time in seconds and in milliseconds — ten digits or thirteen, same panel, right answer either way. The preview leads with the local time and the relative reading — 1 year ago, in 3 hours — because that is the sentence you copied the number in order to obtain. Underneath sit UTC, ISO 8601 and the epoch in milliseconds.

The copies run the other way too. Copy an ISO 8601 date and Rakkun hands you the epoch back — the direction you need when you are writing a query or a test fixture rather than reading a log. Copy ISO 8601, Copy local date, Copy epoch (s) and Copy epoch (ms) live under ⌘C, and an epoch variant identical to the clip you already have is dropped from the menu rather than offering to copy the clip back to you.

Relative time is shown and deliberately not offered as a copy: “2 hours ago” is wrong the moment it lands somewhere permanent.

It happens before you ask

This is the part that changes the habit rather than shortening it. There is no “convert” button to press, because the conversion already happened when the number hit your clipboard. Press ⌘⇧V and read. Press esc and you are back where you were, with your clipboard untouched unless you asked for something.

Timestamps are one of fifteen kinds Rakkun tells apart on sight — the same panel pretty-prints JSON, decodes JWTs, draws copied SVG, formats SQL and turns a cron expression into a sentence. The history is unlimited and stays on your Mac: the app ships with no network entitlement, so macOS itself prevents it from opening a connection.