Calendar feed of problem unlocks?

[jake223]

I tend to put the new problem releases into my calendar so I can remember to be online to solve them when they come out, if I'm free and awake. It would be cool if there were a google calendar feed or similar that I could use to import the times directly, either once per cycle of problems or once ever, rather than manually typing all the problems into my calendar once every few months.

[hk]

The problems come at regular intervals of one week plus 3 hours.
After Sunday 10:00 server time comes the next week Saturday 13.00 server time.
Perhaps you can make a program to feed your calendar with.