I don't routinely change the time on my camera when I travel because it just never occurs to me. It has caused me problems when uploading to blip, especially when I have traveled to Australia. Apparently, it has worked in my favor today.
Last night I walked from Caesar's Palace to the T-Mobile Arena and back. On my return trip, I caught the last Fountain Show at the Bellagio Hotel and stopped to take a few shots. The EXIF data registered as after midnight. Since I flew home this morning and didn't arrive on the East Coast until after dark, this has worked well for my blip.
While watching the fountains dance across the water, Frank Sinatra sang. It was such a Las Vegas moment.