Q: How many days did January have when it was first added to the calendar?

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November 1 is the 305th day of the year (306th in leap years) in the Gregorian calendar.

6,932.5 days

January was extended to 31 days 2055 years ago, in 44 BC. That was just a small part of a major calendar reform undertaken by Julius Caesar, the final product being the Julian calendar.

A calendar is a list of days of the year. There are 365 days in a normal year so a normal calendar has 365 days. In a leap year, which occurs every 4 years, there is an extra day added so there are 366 days. That extra day would fall on the 28th of February

Sosigenes created the calendar to follow the equinoxes. He used the Julian Calendar that was created by Julius Caesar in 46 B.C. To do this he calculated that 23 days be added after February 23rd, two months be added between the end of November and the beginning of December. Thus, adding 67 days to the "then" calendar.

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Until about 713 BC, it had only 10, beginning with Martius in the spring, ending with December. They had 304 days, the other 61 days being unnumbered winter days. The Numa calendar added the months of Ianuarius and Februarius to bring the total to 12 months and 355 days. All months except Februarius had either 29 or 31 days, and there was an extra month added about every other year to even out the seasons by making some years 377 or 378 days.

6,932.5 days

It was a political, religious and superstitious decision made roughly 2700 years ago by the Roman King Numa Pompilius. Up to that point the Romans had a ten-month calendar with 304 days, and approximately 61 winter days (between December and March) that were not assigned to any month. Numa created a new twelve-month calendar with 355 days by adding January (29 days) and February (28 days). In general, February has contained 28 days ever since. Interestingly, February's 28 days were the second month of the Roman civil calendar but the last (twelfth) month of their religious calendar.

November 1 is the 305th day of the year (306th in leap years) in the Gregorian calendar.

18 months of 20 days each and 5 extra days added in to make it 365 days

Solar days are the times of days that are tracked on the calendar. The days are longest in December and June at the solstices, not in January or July.

The calendar used in Australia is the Gregorian Calendar, which divides the year into 365 days, and a Leap Year (of 366 days) in every year that is divisible by four. In the Gregorian Calendar, Leap Years do not occur in centenary years that are not divisible by 400, such as 1900 and 2100. The Gregorian Calendar was derived from the Julian Calendar in 1582. The Julian Calendar is not fixed to commence on the first of January, and has a leap year "every" fourth year.

It doesn't. It has 354 days because the months are lunar. But an extra leap month is sometimes added.

January was extended to 31 days 2055 years ago, in 44 BC. That was just a small part of a major calendar reform undertaken by Julius Caesar, the final product being the Julian calendar.