Tag Archive | Gregorian Calendar

When Easter Sunday Has Fallen On ‘April 1’, “April Fool’s Day” — Last Time Was 1956.

by Anura Guruge

Click to ENLARGE.

The sea change Gregorian calendar was introduced in October 1582.

Easter Sunday fell on April 1 two years later in 1584 — which, coincidentally, was also around the time the notion of “April Fool’s” kicked-in. One theory is that around this time, in France, the start of the New Year was moved from ‘April 1’ to ‘January 1’. Those who got confused by this move were referred to as April Fool’s. That, however, is one theory.

I have as yet not been able to work out why we get a 62-year gap … as between 1956 and 2018 and twice in prior years. The 68-year confounds me even further.

11-year gaps for such ‘movable holidays’ is common — the 11 having to do with the 7-day week and leap years every 4-years. As you can see we do get 11-year gaps quite often, just not the last time around. 35-year gaps are fairly common too.

But, 62- and 68-year are the LONGEST possible gaps for Easter.

Related posts:
Check Categories ‘holidays‘ & ‘religion‘.
Search on ‘Easter‘.

by Anura Guruge

RED LETTER DAY IN WORLD HISTORY. The Gregorian Calendar First Used, This Day, 435-Years Ago.

by Anura Guruge

Click to ENLARGE and study here. Wikipedia: en.wikipedia.org/wiki/Adoption_of_the_Gregorian_calendar

Pope Gregory XIII papal bull ‘Inter gravissimas’ in its original Latin form.

English translation of the key paragraph from Inter gravissimas. From: myweb.ecu.edu

Pretty significant day. The Papal States, France, Poland and Spain adopted the revolutionary Gregorian calendar on Thursday, October 4, 1582 — the NEXT DAY then having become Friday, October 15, 1582. Pretty incredible. 10-days were just expunged. Gone. Poof. If your birthday fell between October 5 to October 14, you were out of luck in 1582. Your birthday vanished.

In reality the adoption of the calendar did not cause much of a stir. Much of the European population, at the time, were not that concerned about daily calendars. They went by the seasons and each day as it unfolded.

But, this was a BIG day. It demarcated history’s very timeline!

Related Posts:
++++ Check Category ‘Events’  >>>>

by Anura Guruge

The Divine Johann Sebastian Bach Was Born This Day 332-Years Ago; March 21, 1685!

by Anura Guruge

Click to ENLARGE and read snippet here. Wikipedia link: en.wikipedia.org/wiki/Johann_Sebastian_Bach

Kind of funny. ‘March 21’ is his birthday per the ‘Old System’ – i.e., the pre-Gregorian calendar. But, it would appear that in his time this would definitely would have been his birthday.

So, let’s tip our hat to this great composer.

Related Posts:
++++ Check Categories ‘Events’ for other related posts >>>>

by Anura Guruge

Edmond Halley, Of Comet Fame, But Really A Brilliant, British Polymath Died 275 Years Ago — Today.

by Anura Guruge

Click to access the Wikipedia entry for “Edmond Halley”.

Edmond Halley (29 October 1656 to 14 January 1741 (new Gregorian calendar)), though best known for COMPUTING the periodic orbit of the comet that bears his name, was quite the man.

Son of a wealthy soap-maker in London, Edmond had the privilege of being able to pursue the many things that interested him.

Just a few of his many amazing achievements include:

  • Financing and publishing Sir Isaac Newton’s, quite literally earth-moving, Philosophiæ Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy) — which among other things included his eponymous laws of motion.
  • Worked out how to determine the size of the Solar System by observing transits of Mercury and Venus across the face of the Sun.
  • Reliably catalogued the stars in the Southern Hemisphere.
  • Built a working diving bell!
  • Realized that some comets were periodic and calculated the orbital period of one, 1P/Halley — which he never got to see!
  • Britain’s second Astronomer Royal.

He was an exceptional mathematician. He also made some major contributions in the fields of meteorology, geophysics and physics,


Halley’s famous comet; 1P. In 1910. Click to ENLARGE.

Last time around was in 1986 when it didn’t put on a big show because the Sun was between the comet and Earth when it was at its closest to Earth.

Next time — 2061! 45 years hence. I will not be around.

Google Doodle for Edmond Halley's 355th Birthday, November 8, 2011 (old calendar).

Google Doodle for Edmond Halley’s 355th Birthday, November 8, 2011 (old calendar).

Related posts:
++++ Check Categories ‘Astronomy& ‘Events’>>>>

by Anura Guruge

2016 ‘Leap Day’, February 29 Will Fall On A Monday — A Favorite Day For Leap Days.

by Anura Guruge

Click to ENLARGE.

I don’t know if you ever thought about it but calendars (through their very nature) repeat themselves — i.e., you have years where the dates fall on the same days of the week (which means that January 1 on both years fell on the same day of the week). As the above image shows the calendar for 2016 is the same as that for 1988. So if you had a 1988 calendar you could reuse it, sans any issues, this year. For 2017 you could reuse that of 1989.

Basically, typically within OUR lifetime, calendars repeat every 28 years BUT this is NOT always the case. That has to do with the ‘NO LEAP DAY on century years that are NOT divisible by 400’ caveat. [That meant that there were NO February 29s in 1900, 1800 or 1700 since those century years are not divisible (exactly) by 400. But there was a February 29 in 2000, because it was divisible. Same in 1600. 2100, 2200 & 2300 will NOT contain Leap Days. 2400 will. Bit confusing … right?]

Once the 400 year rule is factored in our Gregorian Calendar (after the pope) TOTALLY repeats itself, without exceptions to do with Leap Years, every 400 years. During these 400 year cycles there will always be 97 Leap Years and as such 97 Leap Days.

15 of those 97 Leap Days will fall on a Monday, as is the case this year and WAS in 1988, 1960, 1932 & 1904.

BUT if you go back 28 years from 1904, i.e., to 1876, February 29 was on a Tuesday. That was because 1900 was a Century Year (i.e., divisible by 100) BUT was not divisible by 400.

15 Leap Days will also fall on a Wednesday. But only 13 will fall on a Sunday, Tuesday or Thursday, and 14 on Friday or Saturday. Isn’t that cool?

**** Search ‘calendar(on sidebar) for many other posts from multiple years >>>>

by Anura Guruge

Pope Francis’ Plans To Change The Date For Easter Could Have Many Christians Up In Arms.

.Anura Guruge December 2014 thumbnail
by Anura Guruge

Some Related Posts (click to access):
* Pope Francis mum on Charleston shooting.
* Pope Francis Climate encyclical.
* Pope nixes German popemobiles.
* Pope’s new sex abuse tribunal.
* Coming U.S. via Cuba.
* Peace with nuns, riles Cubans.
>> Francis has dig at gay marriage.
>> Francis nixes gay French ambassador.
Francis says the darnest things 

++++ Search on ‘pope‘ for many other posts >>>>

Click to access the “Catholic News Agency” original.

This is HUGE.

This is even bigger than if he issued an edict accepting gay marriage (something he will never do).

It is on a par with if he permitted female Catholic priests. The only thing that could be BIGGER is if he totally abolished all restrictions, sans caveat, on birth control and abortion.

Yes, it is THAT BIG!

The date when Easter Sunday will be celebrated is something that tore the Church apart — Orthodox Christians celebrate Easter her a different ‘formula’ based on a different calendar. Agreeing on a common date for Easter as been a hitherto irreconcilable difference for over 700 years. Yes, 700 years. We are talking a big deal here.

Yes, agreeing on a common date for Easter would go a long way towards healing the schism between West and East Christianity — Western and the Orthodox.

Trying to work out the date for Easter goes back to the 2nd century. This is big potatoes. The calendar that we now use, the Gregorian Calendar, named after Pope Gregory XIII (#227) [1572 – 1585], came to be because the Church did not like Easter coming around when there was still snow on the ground in Europe. Easter was meant to fall in Spring.

Agreeing on a date for Easter across all Christian geographies in the 2nd century was a pivotal factor that led to the establishment of the Papacy! Prior to that all Bishops had equal standing including the Bishop of Rome (now the Pope). But in the 2nd century, given Rome’s historic standing as the epicenter of the Roman empire other Bishops, including those from the East, approached him to arbitrate the Easter date issue. Bishops of Rome grasped on that to say that this gave them primacy. Easter was discussed and mandated upon at the very first Ecumenical Council, that of Nicaea in 325. We even had a major controversy with a lovely sounding name Quartodecimanism (Latin for the 14th day).

So IF the pope can get ALL Christians, East & West, to standardize on a common date for Easter Sunday it would be HUGE.

It will make this pope a legend in history. He will surpass John XXIII (#262), John Paul II (#265), Pius X (#258).

This is HUGE.

But it will all depend on what the reconciliation is.

IF the Orthodox agree to adopt the Western date without any caveats it would be HUGE.

There will be dancing on the streets.

There will be calls to Saint the Pope even as he is alive.

But if any concessions are given to the Orthodox all hell will break lose.

Protestants will take umbrage to the Pope messing with THEIR Easter.

Even Catholics would balk.

So heads up. This makes the Pope’s climate control encyclical look trivial.

%d bloggers like this: