This one is also related to he --intervals command. The output appears to be american date format "Month/Day/Year Hour:Minute:Second"
Program:firefox | 08/30/15 12:58:42 | 08/30/15 12:59:42 | 2m00s
I think there should be a way to get this info in local format or even better in iso8601 format.
This has two advantages: it sorts nicely and more importantly, it also contains the timezone.
To prevent breaking existing workflows, this should probably be an option or a flag.