5 o'clock = Happy Hour. I use that phrase when I leave work at 1:00 pm on Friday headed to Happy Hour.

My guess is Scott and I have/had alot in common. I've been known to crack one on Saturday at 11:00 am.....and what do I say?
"Oh, well. It's 5 o'clock somewhere!"
That saying has been around alot longer that Alan Jackson's song (with Jimmy Buffet's cameo)......and I love it!