A few years ago, I made plans to fly from Minneapolis to Amsterdam to Bucharest on the day before Thanksgiving. I was going to be gone for four days. (I know — crazy, right?)
It had been several years since I had traveled internationally, and this trip had come up sort of last-minute. I found my passport (major victory) and noted that it was good until February.
I packed my carry-on and arranged with a Romanian friend to buy hair conditioner so I wouldn't have to check a bag. (Even over just four days my head requires way more conditioner than I could legally take in a carry-on bag.) Got to the airport three hours early. (It was, after all, the day before Thanksgiving.)
I got through security in one minute, which left me three hours before my flight.
At boarding time, I handed my passport and boarding pass to the agent. Sorry, she said. No good. "Your passport expires in four months," she said.
"Right," I said. "But I'm coming home Sunday."
This is when I found out about the six-month rule: Many countries won't let you in if your passport is within six months of expiring.
The gate agent had a hard time explaining to me why this was so, and at that point I didn't care why. I cared about Romania: What were their rules? Would they let me in?