Google's cute doodle for the Leap Day (29th February) 2024.

WHAT IS A LEAP DAY/YEAR?🤔🧐
Common/Calendar Year (y)=365 solar days 🗓
Solar/Tropical/Astronomical Year (Y)=365.2425 solar days🌏🌞
Y-y=0.2425; 4*(Y-y)=0.97=1-0.03 (+1 if divisible by 4)
100*(Y-y)=24.25=(25-1)+0.25 (again -1 if divisible by 100)
400*(Y-y)=97=4*(25-1)+1 (again +1 if divisible by 400)

That is to say,
Using logical and modulo operators, the year n is said to be a leap year if and only if:
(n mod 4=0)∧((n mod 100≠0)∨(n mod 400=0)).

In other words, a year is a leap year if it is evenly divisibly 4, except for years that are evenly divisible by 100 but not evenly divisible by 400.

For example, 2024 and 2028 are leap years; 2100 and 2200 are not, but 2400 and 2800 are.

This is our clever method to ensure that our calendar stays aligned with our seasons or Earth's orbit over time. If nothing were done about this discrepancy, our calendar would slowly drift out of sync with the Earth's orbit and seasons. After 100 years, we would be off by about 25 days! So, to fix this, we add an extra day, February 29, to the calendar every four years, with the exception that a year evenly divisible by 100 is not a leap year unless it is also evenly divisible by 400 (as shown in the calculations).

#LeapDay #LeapYear #Feb29 #February29 #29Feb #29February #ExtraDay #February #Earth #Sun #SolarYear #SolarDay #Astronomy #Calendar #CommonYear #CalendarYear #TropicalYear #AstronomicalYear #Season #Seasons #EarthOrbit #OrbitEarth #Year #Discrepancy #Discrepancies #Synchronization

NMIF29

Nothing Matters: Its February 29th!!!

#feb29
#leapyear
#leapday
#bissextile

Why is it so hard to plan for and test something that we know hundreds of years ahead of time is going to happen, and which happens every few years?

#feb29

https://arkoinad.com/posts/leap_day_2024.html

#leapday #feb29 #leapday_post #humor

Another article about the satirical french newspaper La Bougie du Sapeur that publishes an issue once every four years, on February 29.

🗞️ https://www.niemanlab.org/2024/02/the-future-of-news-is-print-in-france-once-every-four-years/

“American newspapers continue to cut print days — from the traditional 7 issues a week to 6, or 3, or even 1. Maybe La Bougie du Sapeur has figured out the end game.” [Joshua Benton/Nieman Lab]

#labougiedusapeur #newspapers #newspaper #france #french #journalism #29feb #29feb24 #LeapDay #leapday2024 #feb29

Why not July 32nd instead of February 29th? That way we get a warm day to work…

#feb29 #february

In France there is a quadrennial, or four-yearly satirical newspsaper that only comes out on 29 February, so once every leap-year: La Bougie du Sapeur

🗞️ https://au.news.yahoo.com/french-readers-enjoy-la-bougie-000632411.html

Enjoy

#leapyear #29feb #feb29 #29feb24 #labougiedusapeur #newspapers #satire #satirical #newspaper #france #french