Relative Dates in Activity Report

I use my personal Preferences\Activity to show posts I have made as a form of time sheet.

At Is there a way to turn off relative dates? - #4 by riking, I learned I can hover over relative dates and get the actual date/time.

Unfortunately the relative date can show say 1 day ago but the hover can cover two days. I presume this is a function of the 1 day being calculated based on a non local time zone. Is there a way to set that time zone to my local time zone?