You can log time from a milestone using the formats: 1h, 1 h, 1 hour, 2 hours, 30m, 30min, 1h30, 1h30m, 1:30
Here's a brief tutorial:
Why log time?
In the case of a POD:
Hours you put into the pod can be logged in AuthorDock. In the spirit of an hour exchange (aka time bank).
The time you log into milestones are 'banked' as credits you can expect to redeem in the output of others.
The idea is to encourage contribution and discourage 'freeloaders.' Every author will find a way to contribute to the whole.