Yes it last an entire month and people don???t eat, drink (not even water) from dusk till dawn, some kids do as well, my kid 11years old is doing it for the entire month, no eating, drinking, being nicer and help others etc???., my other kid started fasting Ramadan at the age of 8 and was able to control her thirst, hunger, anger and other things that adult don???t have courage to try.