What is the difference?

I've got 2 questions for native speakers of English.

#1. Can someone explain the difference between "Dilemma" and "Catch 22"?
Also, please give me an example of each term in real life.

#2. "New York is 3 hours ahead of LA."
If I want to mention LA first, how would the sentence change?
"LA is 3 hours behind to New York." Does this make sense?

Oops I was gonna post this on English forum.

Native,
A 'dilemma' involves a choice between at least two equally unfavorable alternatives ('bad' vs. 'bad')

--eg. 1). you're gonna die or 2). you're gonna die. choose.

A 'catch-22' is a type of dilemma, but specifically a situation where the desirable course of action is negated or cancelled out by the course of action itself.

--I have the perfect example, and it is a true one I recently experienced. In NC, we have automobile inspection stickers. Mine was expired. My car registration was also expired. I went to get my registration renewed, but I was told that I could not until my inspection sticker was renewed. HOWEVER, they told me that I could not get my inspection sticker renewed unless I had a valid registration. =catch 22.

"LA is 3 hours behind New York." --leave the "to" out.

So, why is it called 'catch-22'?

It's named after a novel.

For crying out loud. You know enough to use the Internet so you should be capable of googling "Catch 22." Here, try this:

http://en.wikipedia.org/wiki/Catch-22_(logic)