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Minoru Saba (minorusaba@toad.social)'s status on Sunday, 05-Jan-2025 14:12:35 JST Minoru Saba

Just remembered that Isaac Newton[1] was born on 25 December *and* 4 January due to Julian calendar being replaced by Gregorian.
https://en.wikipedia.org/wiki/Old_Style_and_New_Style_dates
1. https://mastodon.social/@gutenberg_org/113770037869591452
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  Project Gutenberg (@gutenberg_org@mastodon.social)
  
  from Project Gutenberg
  
  Attached: 1 image English polymath Isaac Newton was born #OTD in 1642. Newton's book Philosophiæ Naturalis Principia Mathematica, first published in 1687, achieved the first great unification in physics and established classical mechanics. Newton also made seminal contributions to optics, and shares credit with German mathematician Gottfried Wilhelm Leibniz for formulating infinitesimal calculus, though he developed calculus years before Leibniz. https://www.gutenberg.org/ebooks/author/6288 #books #physics #mathematics
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  Muro deGrizeco :toad: (murodegrizeco@toad.social)'s status on Sunday, 05-Jan-2025 17:07:00 JST Muro deGrizeco :toad:
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  @minorusaba
  Forgive me if I have already mentioned the 30th of February...
  https://en.m.wikipedia.org/wiki/List_of_non-standard_dates#February_30
  
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  Minoru Saba (minorusaba@toad.social)'s status on Sunday, 05-Jan-2025 20:21:58 JST Minoru Saba
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  - Muro deGrizeco :toad:
  @murodegrizeco Thanks for the link.
  Didn't know about 30th of February.
  Had thought there had been riots in England over the "loss" of eleven days due to the change to the Gregorian calendar, but that seems to have been a myth:
  https://en.wikipedia.org/wiki/Calendar_(New_Style)_Act_1750
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    Calendar (New Style) Act 1750
    
    The Calendar (New Style) Act 1750 (24 Geo. 2. c. 23), also known as Chesterfield's Act or (in American usage) the British Calendar Act of 1751, is an Act of the Parliament of Great Britain. Its purpose was for Great Britain and the British Empire to adopt the Gregorian calendar (in effect). The Act also changed the start of the legal year from 25 March to 1 January. The Act elided eleven days from September 1752. It ordered that religious feast days be held on their traditional dates – for example, Christmas Day remained on 25 December. (Easter is a moveable feast: the Act specifies how its date should be calculated.) It ordered that civil and market days – for example the quarter days on which rent was due, salaries paid and new labour contracts agreed – be moved forward in the calendar by eleven days so that no-one should gain or lose by the change and that markets match the agricultural season. It is for this reason that the UK personal tax year ends on 5 April, being eleven days on from the original quarter-day of 25 March (Lady Day). Provisions...

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