By calculation (generator: ["day_week@trueknowledge.com"]) I know that:
Wednesday
is the day of the week of
December 15th 1920
Thursday
is the day of the week of
December 15th 1921
Friday
is the day of the week of
December 15th 1922
Saturday
is the day of the week of
December 15th 1923
Monday
is the day of the week of
December 15th 1924
Tuesday
is the day of the week of
December 15th 1925
Wednesday
is the day of the week of
December 15th 1926
Thursday
is the day of the week of
December 15th 1927
Saturday
is the day of the week of
December 15th 1928
By calculation (generator: ["timepoint_when_day_happened_on@trueknowledge.com"]) I know that:
December 15th 1923
is a timepoint when the day happened on
Saturday, the 15th of December and 1920s
December 15th 1928
is a timepoint when the day happened on
Saturday, the 15th of December and 1920s