Last modified: 2012-08-04 21:11:09 UTC
For the relative time stamp, let's say 'day', 'hour' and 'min.' (instead of 'h' or 'm') -- and exclude seconds at this time, which seems like overkill.
MW core language time period formatting implementation only allows to avoid seconds when the period is greater than 1 hour. Implemented accordingly, abbreviations removed.