circa 1980 Casio with clock, similar to fx8100

12122018, 06:17 PM
Post: #15




RE: circa 1980 Casio with clock, similar to fx8100
(12122018 11:24 AM)xerxes Wrote: In such a case, I use the workaround of year28 to have the correct weekday. NB: that trick doesn't work unless every year in the interval that's a multiple of 4 is a leap year. The latest turn of the century was 2000, which was a leap year (multiple of 400) but 1900 was not and 2100 won't be! 

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