bpo-46266:  Add calendar day of week constants to __all__  (GH-30412) (GH-30424)

(cherry picked from commit e5894ca8fd05e6a6df1033025b9093b68baa718d)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
4 files changed