convert time in seconds after midnight to a certain interval

Given the time in seconds after midnight and an interval of what minutes it needs to be rounded to. So for example, if the output of like a datestr function gave 02:07 and my interval was 5 I would need it to be 02:05. How would I do this?

[Mathieu NOE]

hi you need to make modulo(5) of the seconds

seconds_rounded = seconds - mod(seconds,5)

Answer 1

[per isakson]

The script

%%
obj = duration( 0, 0, 2*3600+7*60 );
obj - mod( obj, minutes(5) )

outputs

ans = 
  duration
   02:05:00
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