1st Wednesday

1st Wednesday (a.k.a. Wednesday the 1st) is a first day of the a month that begins on Wednesday. Previously, the three instances of 1st Wednesday occur in January, April and July, all three have occured in 2020. Currently, 2021 contains two instances of it (occuring on September and December). The next one will be in June 2022.

Comparison with Friday the 13th
1st Wednesday also begins on the first day of any month preceding the last day of any month starting on Sunday.