ptr120 the official two day Eid al Fitr holiday starts the day after the new moon that signifies the end of Ramadan is sighted. It is expected to be 26 and 27 June. But since many use the holiday to escape the summer heat it unofficially is about 10-11 days from the start date. Most flights are very busy in that period and there is no indication that that will chnge this year. Please remember that there is also Eid al Adha 1-3 September. There is a discussion about the two Eids on the http://www.flyertalk.com/forum/qatar...-2017-a-4.html thread posts 40-60 approximately.