Pretty nice time lapse effect you've done here. I like the inclusion of the moon at the beginning as well.
To do animation of the sun beyond e.g. 0 degrees heading or 90 degrees vertical, simply add/subtract and type in the appropriate values manually. In other words, if you wanted to go from 340 degrees to 30 degrees, you would start with a key frame at 340, then do a key frame with the value of 390, which is the 20 degrees past your starting point to reach 360 plus the 30 degrees beyond 0.
- Oshyan