Dear Amos, Aristeo, Victor & Calendar People
My yerm calendar had night 15 of the month begin at noon Dec 3. See
This reminded me of a Christmas lunisolar calendar I invented in December 2009 . Today’s date 2017-12-06 would be 2017 L 18 in this calendar. This year is an abundant year and so month L has 30 days instead of the usual 29 days and this year also has a leap month M, which begins on 19 December. I give details of the calendar next:
(1) Months are named after letters of our alphabet from A to either L or M
(2) Months A, C, E, G, I and K have 30 days, so does month M in any year that has it.
(3) Months B, D, F, H, J and L have 29 days, except month L has 30 days in an abundant year.
(4) A year has month M if and only if month L is over by Christmas day, so Christmas day always occurs in the last month of the lunisolar year.
(5) The abundant years follow a 103-year Helios cycle with 20 abundant years. This rule has the following three equivalent formulations:
(a) Year Y is an abundant year if and only if (20*Y + 51) mod 103 < 20.
(b) The remainder of the year number after dividing by 103 is one of
3, 8, 13, 19, 24, 29, 34, 39, 44, 49,
55, 60, 65, 70, 75, 80, 85, 91, 96, 101.
(c) Take the remainder of the year number after dividing by 103,
if it is less than 15, add two to it,
else if it is less than 51, add one to it
else if it is less than 89, leave it unchanged
else subtract 1 from it.
A year is then abundant if and only if the resulting number is divisible by five.
(6) Lunisolar year 2001 began on 26 December 2000.
The mean month is 29 + 8,111,191/15,287,191 = 29.5305874 days.
The lunisolar spreadsheet parameters are A=1,236,000, B=455,191, C=240,000.
I've worked out some new year days:
Lunisolar year 2011 from 5 January 2011 with 384 days
Lunisolar year 2012 from 24 January 2012 with 355 days
Lunisolar year 2013 from 13 January 2013 with 354 days
Lunisolar year 2014 from 2 January 2014 with 384 days
Lunisolar year 2015 from 21 January 2015 with 354 days
Lunisolar year 2016 from 10 January 2016 with 354 days
Lunisolar year 2017 from 29 December 2016 with 385 days
Lunisolar year 2018 from 18 January 2018 with 354 days
Lunisolar year 2019 from 7 January 2019 with 354 days
Lunisolar year 2020 from 27 December 2019 with 384 days
Hi Aristeo and calendar people,
The last full moon occurred on Sunday, December 3; it was the 15th day of Kislev in the Jewish calendar.
There's no full moon today because it's the 18th day of Kislev.
On Wed, Dec 6, 2017 at 2:25 AM, Aristeo Fernando <[hidden email]> wrote:
Dear Calendar People,
The Romans under Emperor Constantine fixed Easter (Christian Passover) in 325 AD in the Council of Nicaea because the Romans were dependent to the Jews regarding Passover.
The Jews followed suit 33 years later, in 358 AD, under Hillel II, when they reformed their calendars to what it is today. There has never been a reformation since 358 AD. When the Jews are expecting a full moon on the 14th or 15th of the month, there is no full moon today. Why?
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