Tag Archives: repeat

Summer Solstice 2016 ‘Strawberry/Honey’ Full Moon, June 20 — New Hampshire Lakes.

by Anura Guruge

Click pictures to ENLARGE.

Attribution WILL be enforced.

Another in the family has caught the camera bug.
Was very anxious to take her own pictures with her latest camera.

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by Anura Guruge

Today, Monday, June 20, 2016, Summer Solstice Full Moon — IS V. SPECIAL; Last One Was In 1967, Next 2062.

by Anura Guruge


A full moon the exact day of the Northern Hemisphere Summer Solstice (June 20 to June 22) does NOT happen as often as you think.

Calendars (as I talked about here) do repeat on somewhat of a cycle (typically 28 years). Phases of the moon recur too, on a cyclic basis, roughly on a 19-year basis — though it rather than being exact tends to ‘on or near the same calendar day’. And that is the rub (so to speak). ‘On or near’. That has meant that a Full Moon on the Solstice does not happen, like clockwork, every 19 years.

However, it is also NOT a once in a lifetime event for most of us. More like twice in a lifetime.

So enjoy.

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by Anura Guruge

How Often Easter Falls On The Same Day — 1777 to 2076.

by Anura Guruge

I created an Excel spreadsheet and analysed the days for 300 years.

Easter per the Gregorian Calendar can fall between
March 22 and April 25.

Easter 2016 on a March 27 is special. Next one will be 2157.

Click to ENLARGE.



13 times is the MOST it has happened on a given day in that 300 year period: March 31, April 5 & April 16.

It has fallen 11 times each on six separate days, all of them in April: 1, 6, 10, 11, 12 & 17.

10 times on 9 days: March 27, April 4, April 8, April 14 – 15, April 18 – 21.

Never fallen 12 times or 6 times!

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by Anura Guruge

Easter 2016 — On Sunday March 27 Is Very Special … Last In YOUR Lifetime!

by Anura Guruge


Click to ENLARGE.

As some of you know I am intrigued by dates and names and have an incurable addiction for computer-aided (i.e., Excel spreadsheet powered) analysis of dates and names. And as addictions go this is pretty inexpensive, other than in my time, and harmless (though my other addiction, compulsive options trading, takes hardly any time and always makes money).

Well I had created a small spreadsheet to do the Purim and Easter one day apart in 2016 post. And having any type of spreadsheet with dates is a very dangerous thing to I — as the addiction kicks in like a mule on steroids. So yesterday, unable to resist, I populated a new page of that spreadsheet with the Dates of Easter for 300 years (1777 – 2076). It was fun. I then crunched them this-way and that and that even more fun. Yes, I will regale you with data, analysis and charts in the coming days.

Part of the analysis I did was when Easter cycles back to the same day — given that I have two daughters with birthdays in the Easter period, March 22 and April 4. March 22nd is the EARLIEST that Easter can happen and the last time it fell on March 22 was 1818. The next time it will fall on March 22 is in 2285. So Teischan will never celebrate a birthday on Easter. On the other hand Danielle has already had two birthdays on Easter, 1999 & 2010, and will have a third in 2021.

Easter falls 3.3 times more often in April than in March. Plus (as I have found) there are a few prominent repetition cycles for the days: 11, 46, 57 and 141 — 11 the most prevalent.

Danielle’s April 4th is right now in the midst of a 11-year cycle — 1999, 2010, 2021.

Easter on March 27 has happened 10 times in the 300 years (1777 – 2076): 1785, 1796, 1842, 1853, 1864, 1910, 1921, 1932, 2005 & 2016.

So the repetition cycles were: 11, 46, 11, 11, 46, 11, 11, 73, 11.

So yes, Easter 2005 was on March 27.

So there could be people who have seen Easter on a March 27th in 1921, 1932 & 2005. (I think 1910 is close to the upper limit).

So much more over the next few days.

Isn’t this fun. I am, truth be known, very thankful that I am addicted to analyzing dates. It could be much, much worse. SMILE.

Happy Easter. This one is very special. ENJOY.

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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?

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by Anura Guruge