In 12-hour mode (material theme), hour should read "12" instead of "00"
In English in 12-hour time, it's customary to show the hour as "12" instead of "00" with both AM and PM. E.g.: https://simple.wikipedia.org/wiki/12-hour_clock
00:05 (24 hour) = 12:05AM (currently displays as 00:05AM) 12:05 (24 hour) = 12:05PM (currently displays as 00:05PM)
This is in the material theme.
On the classic theme, the drop-down doesn't have this issue (it shows 12:30PM), but once you select a time the display reverts to "00:30PM".
I'm glad it's a known issue! I thought it was something I was doing wrong.
If you're interested, I fixed the issue on my project by going to lib/common/TimePicker.js and updating line 566.
@mjperales - do you have a PR or gist for the change?