There was no sighting of the new moon, thus Rabī' at-Thānī completes 30 days and the 1st of Jamādī al-Ūlā 1442 AH is on Wednesday, December 16, 2020 inshā'Allāh. 

Allah bless the Ummah with Khair and protect from all Sharr, Āmīn.