I submitted an idea that was "made available" in version 13 (Oct 2018), but it was only adapted to the Source monitor and not the Timeline / Program monitor.

Here's the idea again (can we please add this feature to the timeline?).

Currently, to go to a particular timecode in the Timeline you have to type all 8 digits, which is annoying and slow. Please allow:
1) us to use "." to insert "00", which is faster and widely used elsewhere (ie - "1..." equals "01:00:00:00").
2) us to type partial timecodes, allowing the hours / min / seconds to be understood by Premiere if they aren't entered. So if I'm at TC 01:02:15:00 and I want to go to the even 30 second point of that minute, I just type "30." or "3000" and hit enter. Premiere should assume the missing hour (01) and minute (02) and place me at 01:02:30:00.

https://adobe-video.uservoice.com/forums/911233-premiere-pro/suggestions/34090450-better-tc-entry-for-timeline