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Sam Minter (abulsme@mastodon.social)'s status on Monday, 29-Apr-2024 17:32:25 JST Sam Minter

@GrahamDowns Early 90’s, when I was in college, I was a rebel (and a massive geek) and had a program on my HP48 calculator to give me the full Julian Date, and I dated all my class notes and assignments with that instead. As I type this message it is 2460429.7822 Julian. But I never internalized those, so still had to convert back to a “normal" date if I wanted to know when I had dome something.
https://en.wikipedia.org/wiki/Julian_day
In conversation about 7 months ago from mastodon.social permalink
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  Julian day
  
  The Julian day is the continuous count of days since the beginning of the Julian period, and is used primarily by astronomers, and in software for easily calculating elapsed days between two events (e.g. food production date and sell by date). The Julian period is a chronological interval of 7980 years; year 1 of the Julian Period was 4713 BC (−4712). The Julian calendar year 2024 is year 6737 of the current Julian Period. The next Julian Period begins in the year AD 3268. Historians used the period to identify Julian calendar years within which an event occurred when no such year was given in the historical record, or when the year given by previous historians was incorrect. The Julian day number (JDN) is the integer assigned to a whole solar day in the Julian day count starting from noon Universal Time, with Julian day number 0 assigned to the day starting at noon on Monday, January 1, 4713 BC, proleptic Julian calendar (November 24, 4714 BC, in the proleptic Gregorian calendar), a date at which three multi...

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