When I was in Afghanistan for 5 weeks, I arrive the day Ramadan began. I left 2 days after it ended. I observed it fully the whole time, not always by choice, but I thought it would be an interesting experience :)

I was also fairly devout catholic growing up, so we did a fair number of fasts. My catholic upbringing, in fact, is probably why I feel doing anything to make a fast easier is cheating :)