I notice that the Usage tab lists the time and date in US format (using terms such as AM and PM).
I suggest having Glasswire check the locale of the system the software is running on and then using the correct time and date format. For example, here in the UK (and in Europe, I believe, and much of the rest of the world), we use 24-hour time. Also, our locale is such that we put the day before the month.
So instead of seeing the US date and time format of ‘Apr 29, 2017 12:00 AM’ in the header section of the Usage tab, I would expect to see the UK equivalent, which is ‘29 Apr 2017 00:00’.
EDIT: And actually, this should apply to the rest of the application too. All over the place, in various other tabs too, I see the times and dates are currently all in US format.