Infrapink (he/his/him) · @Infrapink
92 followers · 954 posts · Server mastodon.ie

In 1900, Maksim Trpković revised the . Under his system, an year that yields a remainder of 0 or 400 when divided by 900 is a .

Milutin Milanković slightly altered this in 1923, changing the rule to years that give a remainder of 200 or 600. A mean year in this calendar is just 2 seconds off the . It is used by some, but not all, churches.

#JulianCalendar #leapyear #tropicalyear #easternorthodox

Last updated 2 years ago

Infrapink (he/his/him) · @Infrapink
92 followers · 952 posts · Server mastodon.ie

In the 17th century, recognised that the was deficient but the was too for him. He worked on a new calendar whose mean year was just a few seconds shorter than the (the mean Gregorian year is about 29 seconds longer). Newton viewed this as a feature rather than a bug, because under his system, the dates of the solstices and equinoxes would gradually drift back to those when was alive.

#isaacnewton #JulianCalendar #gregoriancalendar #catholic #tropicalyear #jesus

Last updated 2 years ago

Infrapink (he/his/him) · @Infrapink
92 followers · 945 posts · Server mastodon.ie

The Gregorian calendar came into force in 1568 and was promptly adopted in countries. and countries were slower, since they didn't want to use a invented by Catholics.

In 1568, 10 days were skippedin to recalibrate the civil calendar with the . By the time gave in and adpted the Gregorian calendar in 1758, they had to sip 11 days.

#catholic #protestant #orthodox #calendar #october #tropicalyear #britain

Last updated 2 years ago

Infrapink (he/his/him) · @Infrapink
92 followers · 943 posts · Server mastodon.ie

But, as we now know, the 's mean year is about 11 minutes 15 seconds longer than the , and by the 4th century AD, the dates of the and had drifted from their official dates by several days.

In the 16th century, Gregory XIII used his authority as to reform the calendar again, because that is something can do.

#JulianCalendar #tropicalyear #solstices #equinoxes #pope #pontifexmaximus #popes

Last updated 2 years ago

Infrapink (he/his/him) · @Infrapink
91 followers · 934 posts · Server mastodon.ie

This means that the Romans had no real concept of, say, "The 28th of Martius"; they thought of that day as "three days before the kalends of Aprilis".

But there was another issue. Even with 12 months, the normal year was a little shorter than the . No problem, right? Just add an extra month every 2-3 years, like basically every other culture does?

Yeah, the Romans were *the worst* at timekeeping.

#calendar #tropicalyear

Last updated 2 years ago