Traveling great distances can make adapting to foreign time zones a little more difficult, especially if you aren't used to it. Jet lag is something that affects every traveler, but it can be a little rougher on retirees. The other thing to consider, besides changing the hands on your watch, are the times that you need to take your medications. Many meds are very specific when it comes to what time of day you need to take them. It's vital that you don't get confused with different time zones, or days in cases of distant travel, and lapse or overdose on your prescription medications.