The date of the popular Loi Krathong festival really varies from year to year. Last year it really screwed up my arrival in Thailand and plans to fly to Chiang Mai. I should have checked the dates (November 3) prior to making my travel bookings. I had never seen it that early in November before and it wasn't on my radar. I arrived in Bangkok airport expecting to catch a quick flight to Chiang Mai and all flights were all booked. Luckily, I was able to catch a later flight with some secondary airline, but I had an 8 hour wait in the airport. This year, Loi Krathong festival is on my birthday, November 23, so I can double up on the festivities.