why does the month of February have 29 days
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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 stays in line with the Earth's movement around the Sun.
DAKSH20130115:
explain also
Earth takes about 365.2425 days to complete a full revolution around the Sun not exactly 365 days. So after every 4 years, there will be about one-day lag i,e seasons will also be lagging by one day every 4 years. And if this lagging gets accumulated then after some decades, months will not correspond to the seasons. Like, winter will not show up in December or one has to celebrate Thanksgiving when crops are not even ready to harvest.
was decided to add one day every 4 years to compensate that lagging. Since the month of February already has the least number of days, that extra day was added to February, just a decision, that year is called ‘leap-year’.
The rule for the leap year is:
Most years that can be divided evenly by 4 are leap years except century years. Century years are leap years only if they can be evenly divided by 400
The rule for the leap year is:
Most years that can be divided evenly by 4 are leap years except century years. Century years are leap years only if they can be evenly divided by 400
Some basic math behind leap year:
A complete revolution for the earth around the sun takes about 365.2425 days.
If we consider a year to be of 365 days then after every 4 years we will be lagging by 0.2425*4=0.97days. This can be adjusted by adding one extra day every 4 years. With this correction, after a 4 years span, we will be lagging by 365.2425*4-(365*3+366)=-0.03day. A negative sign indicates leading not lagging. Let’s call this correction-1.
A complete revolution for the earth around the sun takes about 365.2425 days.
If we consider a year to be of 365 days then after every 4 years we will be lagging by 0.2425*4=0.97days. This can be adjusted by adding one extra day every 4 years. With this correction, after a 4 years span, we will be lagging by 365.2425*4-(365*3+366)=-0.03day. A negative sign indicates leading not lagging. Let’s call this correction-1.
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oh thnx ✌✌
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Explanation:
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 stays in line with the Earth's movement around the Sun
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