at the moment my script converts hh:mm:ss to seconds then adds seconds on then convert back to hh:mm:ss format.

Caveat:

Unless you're using GMT, or are working within a time zone that does not honor daylight savings time, doing simple math on raw time components will give you the wrong results during two one-hour windows each year.

Since the daylight savings switch happens at 1-2am, this might not be an issue to you. But do be aware.

Using one of the various Data/Time packages is safer.

In reply to Re: increment hh:mm:ss by dws
in thread increment hh:mm:ss by marauder

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