Bash convert epoch to date, showing wrong time

This particular timestamp is in milliseconds since the epoch, not the standard seconds since the epoch. Divide by 1000:

$ date -d @1361234760.790Mon Feb 18 17:46:00 MST 2013

bash date epoch

You can use bash arithmetic expansion to perform the division:

date -d @$((value/1000))

Note that "value" is a bash variable with the $ being optional; i.e., $value or value can be used.

bash date epoch

For Mac OS X, it's date -r <timestamp_in_seconds_with_no_fractions>

$ date -r 1553024528Tue Mar 19 12:42:08 PDT 2019

$ date -r `expr 1553024527882 / 1000`Tue Mar 19 12:42:07 PDT 2019

$ date -r $((1553024527882/1000))Tue Mar 19 12:42:07 PDT 2019

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