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
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 >
People in the United States set their clocks back at the end of Daylight Savings Time every year, which usually occurs in October or November. Not all countries in the world use Daylight Saving Time, but many do. It is most popular in the Western Hemisphere.Full Answer >
In the Northern Hemisphere, the official summer season begins with the June solstice, which takes place on June 20th, 21st or 22nd each year, and ends with the September equinox, which takes place on September 22nd or 23rd each year; the exact duration of summer depends on when the solstice and equinox will take place and can range from 92 to 95 days. Though summer is associated with warm temperatures and the concept of 'summer break' for students, the season has an official scientific definition, as is defined above. Summer weather in the Northern Hemisphere may begin before the official start of the season and last until after fall has begun with the advent of the September equinox.Full Answer >
There are 52 complete weeks in a year. The year has 365 days, leaving one extra day. A leap year has 366 days, adding a second extra day. This makes 52 1/7 weeks in a normal year and 52 2/7 weeks in a leap year.Full Answer >