An easy way is to subscribe to RLMs calendar; scroll to the bottom of their main page:
http://www.radiolemans.co/
So for the East Coast of the US (per the RLM calendar and Maggo's layout above), i think this is about right (after an Edit or 2):
Thu 30th January
16:40: Bathurst 12 Hour: Practice 1
20:20: Bathurst 12 Hour: Practice 2
23:05: Bathurst 12 Hour: Practice 3
Fri 31st January
16:40: Bathurst 12 Hour: Practice 4
20:40: Bathurst 12 Hour: Qualifying
Sat 1st February
01:05: Bathurst 12 Hour: Top 10 Shootout
13:45: Liqui-Moly Bathurst 12 Hour