The designation of only 28 days in February began when King Numa Pompilius reformed the Roman calendar around 713 B.C. The Roman calendar then had only 10 months, with no months assigned to winter. Numa added January and February, with February as the last month of the year, and adjusted its length to correspond to a year of 355 days. The Julian and Gregorian calendar reforms later modified its length.Know More
The word February comes from the Roman Februarius, which means purification. Whenever Roman calendars required modification, the changes were made after the 23rd day of February. The remaining days in February were considered a second part of the month. In the Roman calendar, leap months were added from time to time to reconcile calendar and solar years.
In 46 B.C., Julius Caesar introduced the Julian calendar. January became the first month of the year, and the year gained 10 days, increasing from 355 to 365 days. To realign the new calendar correctly, 46 B.C. was 445 days long, and afterwards, the years were of standard length. In the Julian calendar, a leap day was added to February every four years, making it 29 days instead of 28.
The next major reform was the Gregorian calendar, used in most modern western countries. The reform mainly concerns leap year calculations. It leaves out three leap days every 400 years to bring the calendar more closely in line with lunar cycles. It changed the average length of a year from 365.25 days to 365.2425 days, a difference of 10 minutes and 48 seconds every year. Through all these reforms, February remained the short month, as it was originally designated by Numa Pompilius.Learn more about Months & Seasons
Months have different numbers of days because a month is a measure of time that corresponds or nearly corresponds to the length of time the Moon revolves once around Earth. The lengths of all astronomical months vary slightly due to perturbations in the Moon’s orbit.Full Answer >
November is the eleventh month of the calendar year and contains 30 days, or four weeks and two days if counting by a measurement of weeks. Important holidays in the United States that occur in the month of November include Veterans' Day (November 11) and Thanksgiving (the fourth Thursday occurring in November).Full Answer >
There are 30 days in June. June is the sixth month of the year and is preceded by May and followed by July. Both May and July have 31 days.Full Answer >
There are seven months in the Gregorian calendar that have 31 days. The months of the year that have 31 days are January, March, May, July, August, October and December.Full Answer >