About the east to west thing.

I read a NASA report a few years ago that involved putting test subjects in an artificially lit environment with no scheduled events or changes in light for several days or weeks. No clocks.

What ended up happening was the subjects would sleep for 8 hours and be awake for 16.5 hours until going to sleep again. This of course amounts to an extra day of being awake every 14 days and it also is why it's easy to stay up late at night but not so easy to make yourself go to sleep early.