Nowruz, along with the mid-winter celebration Sadeh, survived the Muslim conquest of Persia of 650 CE. Other celebrations such as the Gahambars and Mehrgan were eventually side-lined or only observed by Zoroastrians. Nowruz became the main royal holiday during the Abbasid period. Much like their predecessors in the Sasanian period, Dehqans would offer gifts to the caliphs and local rulers at the Nowruz and Mehragan festivals.