If you read my diary, you'll note that some days are just missing, with comments like [never happened] or Hey, what happened to Tuesday?  These all correspond to a flight from the USA to Australia; I leave late in the evening on one day, and before I wake up, I have crossed the International Date Line (gaining a day), and also past midnight in the USA and Australia, gaining another day. The result is that I really don't experience the intervening day; it's gone. Amusingly, this first occurred to me in a dream in August 1967, where I was keeping my diary on paper, and would have had a real issue with a blank page.

In the other direction, things are even more amusing: the date line compensates for the night, so I typically arrive “before I left”.