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Clock & Calendar Designs

Blue Moon is an extra full moon in a season

Calendar cube puzzle

Calendar strip for my monitor: 18 months but only 5 rows

Calendar trick to determine day of the week

Clock dial has 120 divisions instead of 60

Daylight saving time: government mandates necessary

"Day of the week" indicated by a hand on a clock face

Days with more than 24 hours?  Why not?

Epoch began January 1, 1970

Holidays always fall on Tuesdays?

Seasons begin six weeks earlier for Celts

Stopwatches

Sundials may have defined "clockwise"

Weekly appointment books should have eight days