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what happens every four years ?

Here are some links that might be useful to you:

https://www.livescience.com/human-behavior/why-do-we-have-leap-years-and-how-did-they-come-about

https://www.livescience.com/human-behavior/why-do-we-have-leap-years-and-how-did-they-come-about
Why do we have leap years? And how did they come about?
1 mars 2024Leap years are years with 366 calendar days instead of the normal 365. They happen every fourth year in the Gregorian calendar — the calendar used by the majority of the world. The extra day …

https://www.upbeacon.com/article/2008/02/it-only-happens-once-every-4-years

https://www.upbeacon.com/article/2008/02/it-only-happens-once-every-4-years
It only happens once every 4 years – The Beacon
Learn why leap days occur once every four years, how they synchronize the calendar with the solar year, and what would happen if they were cancelled. Find out the probability of being born on a leap day and some interesting facts about leap day babies.

https://www.msn.com / en-us / news / technology / something-that-happens-just-once-every-4-years-is-happening-next-week-heres-what-to-know / ar-BB1iP7si

https://www.msn.com / en-us / news / technology / something-that-happens-just-once-every-4-years-is-happening-next-week-heres-what-to-know / ar-BB1iP7si
Something that happens just once every 4 years is happening next … – MSN
That means 2024 and 2028 will both be leap years. But still, there are some exceptions to the once-every-four-years rules. That’s because it takes Earth approximately 365.242189 days, or 365 days …

https://www.npr.org/2024/02/26/1232986212/leap-day-explained

https://www.npr.org/2024/02/26/1232986212/leap-day-explained
How does leap day work? Your every-four-years refresher : NPR
26 févr. 2024A clock showing February 29, also known as leap day. They only happen about once every four years. Nearly every four years, the Gregorian calendar — which is used in the majority of countries …

https://apnews.com/article/leap-year-things-to-know-c57638fb88a6e97505c01c19bd3bb9fb

https://apnews.com/article/leap-year-things-to-know-c57638fb88a6e97505c01c19bd3bb9fb
Leap Day: What it means and what would happen without it | AP News
28 févr. 2024He introduced his Julian calendar in 46 BCE. It was purely solar and counted a year at 365.25 days, so once every four years an extra day was added. Before that, the Romans counted a year at 355 days, at least for a time. But still, under Julius, there was drift. There were too many leap ! The solar isn’t precisely 365.25 days!

https://www.history.com/news/why-do-we-have-leap-year

https://www.history.com/news/why-do-we-have-leap-year
5 Things You May Not Know About Leap Day | HISTORY
Nearly every four years, we add an extra day to the calendar in the form of February 29, also known as Leap Day. Put simply, these additional 24 hours are built into the calendar to ensure that it …

https://spaceplace.nasa.gov/leap-year/en

https://spaceplace.nasa.gov/leap-year/en
What Is a Leap Year? | NASA Space Place – NASA Science for Kids
11 avr. 2024A leap year is when we add one day to the calendar to make up for the missing partial day in a solar year. Learn why leap years are important for matching the calendar and the solar year, and how other planets have leap years too.

https://www.scientificamerican.com/article/why-do-we-have-a-leap-year-anyway

https://www.scientificamerican.com/article/why-do-we-have-a-leap-year-anyway
Why Do We Have a Leap Year Anyway? | Scientific American
23 févr. 2024By adding a whole day every four years, we’re adding too much: after four years we only have 0.9688 day left over, not 1.0 day. That difference is 0.0312 day, or about 45 minutes.

https://airandspace.si.edu/stories/editorial/science-leap-year

https://airandspace.si.edu/stories/editorial/science-leap-year
The Science of Leap Year | National Air and Space Museum
Over time, these extra 44+ minutes would also cause the seasons to drift in our calendar. For this reason, not every four years is a leap year. The rule is that if the year is divisible by 100 and not divisible by 400, leap year is skipped. The year 2000 was a leap year, for example, but the years 1700, 1800, and 1900 were not.

https://www.vox.com/science/24080989/leap-year-2024-feb-29-science-animation-calendar-explainer

https://www.vox.com/science/24080989/leap-year-2024-feb-29-science-animation-calendar-explainer
Leap year 2024: Why do we have leap years? – Vox
26 févr. 2024It’s not the strict case that a leap year happens every four years. You might have noticed that a full orbit around the sun takes 365.2422 days, and not a neat 365.25 days. So if we were to have …
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