How come February only have 28 days and 29 days in every other four years?

Answer 1

When the Romans first began working on the one that has become ours, February didn’t even exist.

The problem from the beginning was to reconcile the moon’s 29 1/2 day month with the sun’s 365 1/4 day year. The Romans’ first effort, supposedly devised by their founder, Romulus, included 10 months that added up to only 304 days. Clearly, Romulus had not conceptualized the problem.

The legend continues that King Numa Pompilius added January and February. The days now added up to 355, approximately the number in 12 lunar cycles but still 10 to 11 days short of a solar year. So Numa invented an extra month called Mercedinus that would be added to February every other year.

Answer 2

Earth's orbit around the sun is not exactly 365 solar days, but rather it's 365.24 days. That means, the calendar needs an extra day every four years to catch up to the astrological forces of the solar system. However, years that end in double-zero do not get a leap year, except for years divisible by 400.

Answer 3

the reason being with the aid of fact we expect of of a 12 months as 3 hundred and sixty 5 days, although that is not. A 12 months is the time it takes for the earth to orbit the sunlight, which is going out to 365. 2422 days. by ability of including sooner or later to the calendar each 4 years, it will develop the generally occurring length of a calendar 12 months to 365.25 days. nonetheless no longer fairly sturdy sufficient. by ability of removing one bounce 12 months each century 3 centuries out of four, the generally occurring length of a 12 months comes all the way down to 365.2425, that's very close to to the somewhat length of one holiday around the sunlight. the least perplexing thank you to try this is to end the skipping of the bounce 12 months on the beginning up of each century that is divisible by ability of one hundred yet no longer 4 hundred, that's the 12 months the bounce 12 months is saved. the guidelines got here after the mathematical formula, although. Had it been desperate to characteristic the better day each 4 years beginning up with the 12 months a million, skipping in one 0 one, 201 and 301 yet keeping it in 401, then beginning up the cycle as quickly as extra, the 'divisible by ability of four and four hundred' rule might no longer prepare, however the generally occurring length of one 12 months, 365.2425 days, might nonetheless be reached.

Answer 4

because there are 6 extra hours in every year which we dismiss, we add 1 day to the year every 4 years which we call a leap year. If we didnt, our seasons would be mixed up.

Answer 5

can't really explain that well. check out the link instead

and to all other answerers, he wants to know why there are only 28 days instead of 30.

Answer 6

our 365 days each have a little time left over and every 4 years it equals a day because of revolution and orbit

Answer 7

the earth's revolution needs the extra day to make the....i think you already got the answer.

Answer 8

umm it's called a leap year?!?!?

Answer 9

leap year

Answer 10

leap year.