No leap years on Mondays between 1872 and 1912?

Recycle calendars · Or Don't Recycle Them, After All · No leap years on Mondays between 1872 and 1912?

No. After 1872, the next one in line would have been 1900, but in the Gregorian calendar, 1900, unlike 2000, was not a leap year.

Here is how it works out in some detail, and leap years have two letters for the Sundays. 1900 is marked as G!, starting on a Monday, and remaining G for the rest of the year, due to omission of leap day.

1872 GF	1879 E	1886 C	1893 A	1900 G!	1907 F
1873 E	1880 DC	1887 B	1894 G	1901 F	1908 ED
1874 D	1881 B	1888 AG	1895 F	1902 E	1909 C
1875 C	1882 A	1889 F	1896 ED	1903 D	1910 B
1876 BA	1883 G	1890 E	1897 C	1904 CB	1911 A
1877 G	1884 FE	1891 D	1898 B	1905 A	1912 GF
1878 F	1885 D	1892 CB	1899 A	1906 G

I think I have on the occasion also shown why it is practical to use Dominical letters.

The one for Sunday takes one step back each January 1st, as it is an A coming after December 31st, also A, but weekdays go on.

It also takes one step back on the leap day, whether you count it as "ante diem bis sextum Kalendas Martias" coming after "ante diem sextum Kalendas Martias" or as February 29th coming after February 28th. The named Roman day names in leap years are February 24th and 25th, of which the latter is the day of St. Matthias, outside leap years, there is only "ante diem sextum Kalendas Martias" on February 24th.

So, "ante diem quintum" would on normal years be February 25th, on leap years February 26th, either way it is the day after St. Matthias.

Hans Georg Lundahl
ut supra (vel infra in bloggo)

Or Don't Recycle Them, After All

Recycle calendars · Or Don't Recycle Them, After All · No leap years on Mondays between 1872 and 1912?

I was just reflecting that, even if dates match up with weekdays, they need not match up with phases of the Moon, same way in 2024 as in 1968.

However, I considered - most people are not all that fidgety about phases of the Moon. While the calendar may print those circles that are blank or filled with black, or cut into semicircles with the right or left one black, on the wrong dates for the actual phases of the Moon, most people don't care.

But then I reflected "w a i t" ... "they do: Easter"

Easter Lord's Day back in 1968 was April 14. Easter next year will be on March 31. So, as calendars don't just mark Sundays, but specifically Easter and Pentecost among the other ones, two years need more to match than just the Sunday letters G,F (a k a "leap year starting on a Monday"). Otherwise, you can't use one's calendar for the other.

Like this year, Easter was on April 9 and back in 1967 on March 26. We are in fact 13th Sunday after Pentecost, but with a 1967 calendar, it would appear as 15th Sunday after Pentecost which is not really the case yet.

So, use the calendars that are meant for the year! Or reuse much older ones, if you can get them. Easter in 1996 (also a G,F year) was April 7th ... what about 1940? No. In fact, in 1940, Easter was on March 24, exceptionally early. So, 1912? No, April 7. Previous leap year starting on a Monday was 1872 ... and yes, it also had Easter on March 31 - like next year.

For Tolkien fans, there is another reason to not reuse a calendar from 1968 - there is no Tolkien calendar from back that year. As also not from 1872, though an art calendar from Sarehole that year might look more Shireish than one from 1968 ...

The first printing of a Tolkien calendar was in 1968 (why am I not surprised), and was thus for the year 1969. It was a question of fan art.

The first official Tolkien calendar by Ballantine's (his US publishers) was printed in 1972 and issued for 1973 - the year in which he died.

Speaking of these:
Tolkien Calendar 2024
Brand: HarperCollins, Illustrated by Alan Lee
https://www.amazon.com/Tolkien-Calendar-2024/dp/0008597669

Or try to make your own art calendar ... one suggestion I have made where I live is, make one with quotations (with URL to quoted blog post) from me ... if you wish to help me get known ... (try to make the calligraphy better than I would succeed with). Here is how the first table of days and week days should look:

January
Su	Mo	Tu	We	Th	Fr	Sa
G	A	B	C	D	E	F
	1	2	3	4	5	6
7	8	9	10	11	12	13
14	15	16	17	18	19	20
21	22	23	24	25	26	27
28	29	30	31

Hans Georg Lundahl
Paris
13th Lord's Day after Pentecost
27.VIII.2023

Recycle calendars

Recycle calendars · Or Don't Recycle Them, After All · No leap years on Mondays between 1872 and 1912?

For 2024, weekdays and dates will match up as in 1968.

It's leap years, and that means there are two Dominical letters.

It's beginning on Monday, meaning Monday is starting it as A, this mean G starts out as letter for Sundays "throughout the year" except it only lasts to February in leap years.

As February has 29 days, but March 1st is still same Dominical letter as February 1st, namely D, this means D is one day later in March than in February, namely ... first Thursday, then Friday

G	A	B	C	D ...
Su	Mo	Tu	We	Th ...
Mo	Tu	We	Th	Fr ...

However, this means, the Sunday letter for the rest of the year is moved back one date / Dominical letter:

F	G	A	B	C	D ...
Sa	Su	Mo	Tu	We	Th ...
Su	Mo	Tu	We	Th	Fr ...

Meaning, the rest of the year is having F as the letter for Sundays. I'm sorry (but not too sorry) for being unconventional, one would say Dominical letter changing from G to F, but since all of the A through G times 52 + a single A is also called Dominical letters, one can equally say it's the letter for Sundays that changes.

So, unused unsold calendars from 1968 could be a gift for 2024 .../HGL