Random Thought 💭 …. A Leap Year

A leap year (also known as an intercalary year or bissextile year) is a calendar yearcontaining an additional day (or, in the case of lunisolar calendars, a month) added to keep the calendar year synchronized with the astronomical or seasonal year. Because seasons and astronomical events do not repeat in a whole number of days, calendars that have the same number of days in each year drift over time with respect to the event that the year is supposed to track. By inserting (also called intercalating) an additional day or month into the year, the drift can be corrected. A year that is not a leap year is called a common year.

For example, in the Gregorian calendar, each leap year has 366 days instead of 365, by extending February to 29 days rather than the common 28. These extra days occur in years which are multiples of four (with the exception of centennial years not divisible by 400). Similarly, in the lunisolar Hebrew calendar, Adar Aleph, a 13th lunar month, is added seven times every 19 years to the twelve lunar months in its common years to keep its calendar year from drifting through the seasons. In the Bahá’í Calendar, a leap day is added when needed to ensure that the following year begins on the vernal equinox.

The name “leap year” probably comes from the fact that while a fixed date in the Gregorian calendar normally advances one day of the week from one year to the next, the day of the week in the 12 months following the leap day (from March 1 through February 28 of the following year) will advance two days due to the extra day (thus “leaping over” one of the days in the week) . For example, Christmas Day (December 25) fell on a Tuesday in 2012, Wednesday in 2013, Thursday in 2014, and Friday in 2015 but then “leapt” over Saturday to fall on a Sunday in 2016.

The length of a day is also occasionally changed by the insertion of leap seconds into Coordinated Universal Time (UTC), owing to the variability of Earth’s rotational period. Unlike leap days, leap seconds are not introduced on a regular schedule, since the variability in the length of the day is not entirely predictable.

So that’s the meaning of a leap year 🤪

Published by jab1969

Hi I’m an avid reader. I also write reviews for the books I read. Come in and say hi. You can find me on GoodReads, Bookbub, and NetGalley 👩🏻‍💻 I also review on an awesome site The Reading Cafe (run by Barb and Sandy) So ........ More about me 🤨 I’m almost 50 🤫 I’ve been married (for 27 years) I have a 30 year old son. I had a daughter, I lost her a week before her 21st birthday 😥 and it’s been 5 years since she’s been gone (and not a day goes by that I don’t miss her) I work as a salad 🥗 chef 👩‍🍳 in a restaurant, haven’t been there long (before that I worked in Tesco) a large supermarket in the UK. I also like to make craft items (and if your really lucky) and I’ll try to post my efforts on here 😉 My daughter loved butterflies (so part of my blog name is dedicated to her) I’ve taken on her love of butterflies (I have several tattoos) so I’m probably going to throw quiet a few butterflies on here 😉 I LOVE PENGUINS 🐧 💕so I’m also going to be putting a few on here (my library holds a few) 😉 <img src="https://d1vbo0kv48thhl.cloudfront.net/images/featured_book_reviewer_big.png"

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