By calculation (generator: ["day_week@trueknowledge.com"]) I know that:
Tuesday
is the day of the week of
September 23rd 1980
Wednesday
is the day of the week of
September 23rd 1981
Thursday
is the day of the week of
September 23rd 1982
Friday
is the day of the week of
September 23rd 1983
Sunday
is the day of the week of
September 23rd 1984
Monday
is the day of the week of
September 23rd 1985
Tuesday
is the day of the week of
September 23rd 1986
Wednesday
is the day of the week of
September 23rd 1987
Friday
is the day of the week of
September 23rd 1988
By calculation (generator: ["timepoint_when_day_happened_on@trueknowledge.com"]) I know that:
September 23rd 1981
is a timepoint when the day happened on
Wednesday, the 23rd of September and 1980s
September 23rd 1987
is a timepoint when the day happened on
Wednesday, the 23rd of September and 1980s