Trouble is the date format in the changelog is different than that in the router
“2023-Aug-31 16:55” has to be converted to “2023-08-31 16:55”
found a script from @rextended to convert to epoch to do the math but even that does not like the “Aug” format.
the datetime2epoch script is here http://forum.mikrotik.com/t/i-did-it-script-to-compute-unix-time/68576/30