Convert unix timestamp to date

date -ud "1970-01-01 + 1234567890 seconds"
The "-d" option for gnu's "date" command can calculate positive or negative offset from any time, including "now". You can even specify a source timezone (the output timezone can be set with the TZ environment variable). Useful! Fun! Not very well documented!
Sample Output
$ date -ud "1970-01-01 + 1234567890 seconds"
Fri Feb 13 23:31:30 UTC 2009

# and back again
$ date -ud "Fri Feb 13 23:31:30 2009" +%s

By: zude
2009-10-07 04:35:40

3 Alternatives + Submit Alt

What Others Think

or: $ date -d "@1234567890"
ok · 641 weeks and 5 days ago
On BSD systems you can use the -r option: date -r 1234567890 It is very well documented in the manual page, as is usual on BSD systems. ;-)
inof · 641 weeks and 4 days ago
If you need it a little bit shorter and don't remember the @-shortcut: date -ud "1/1/70+1234567890sec"
uwe · 574 weeks and 4 days ago
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madmardigan · 2 weeks and 4 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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