epoch->calendar date(1) wizardry

[markzero]

> > How may one pretty print an epoch timestamp using date(1)? The date
> > manual page gives me a headache.
> > 
> > Essentially, I have the timestamp in a file:
> > 
> > $ cat t
> > 1117417465
> > 
> > ..and I want to print it in a standard UK format, such as:
> > 
> >   +%H:%M:%S %d/%m/%y
> 
> date -r $(cat t) +"%H:%M:%S %d/%m/%y"

Oh my, it's really that simple? I think I must have tried just about
everything ELSE as my twenty minutes of

  Failed conversion of ``1117417465'' using format ``%H:%M:%S %d/%m/%y''
  date: illegal time format

...suggest.

02:44:25 30/05/05

Thank you!

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