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bashtimedate-arithmetic

Calculating time (adding minutes) bash

I got stuck in part of the script. I have time: for example "16:00" and duration in minutes like: 410.

Is there any easy way to add those two values? I've tried a lot of combinations with date -d, but can't solve it.

Solution

  • Try this (Kysu's version):

    date -d "16:00 410 minutes" +'%H:%M'

    or this:

    date -d "16:00 today + 410 minutes" +'%H:%M'

    But do not use this:

    date -d "16:00 + 410 minutes" +'%H:%M'   # BAD!

    Strange things happen if you omit the word today but keep the +. (I think the + 410 is being parsed as a timezone modifier, and then the minutes is interpreted as "add one minute".)