January is the first month in the Gregorian calendar and is named after the two-faced Roman god Janus.

As far as we know, months were first used in Mesopotamia sometime between the years 500 BCE and 400 BCE to measure the natural period related to the lunar month, or synodic month, which is the …

March used to be the first month of the year in the early Roman calendar. Around the year 700 BCE, the Roman king Numa Pompilius introduced January and February into the calendar, pushing March to …

The resulting calendar, whose structure borrowed heavily from the ancient Greek calendar system, had only 10 months, with March (Martius) being the first month of the year.

A year lasts for about 354 days and consists of 12 months in the Islamic/Hijri calendar. As the first month of the year, Muharram is known as the month of remembrance and it is believed to be the most …

In the Northern Hemisphere, depending on which definition you use, spring can include parts or all of the months of March, April, May, and June. South of the equator, it starts in September and ends in …

June is the sixth month in the Gregorian calendar and has 30 days. It is the first month of astronomical summer in the Northern Hemisphere and astronomical winter in the Southern Hemisphere.

Although daylight hours decrease during the summer months, temperatures continue to rise in most regions. This is because it takes time for Earth, particularly its oceans, to change temperature—an …

December is the twelfth and last month in the Gregorian calendar and has 31 days. The December solstice on December 21 or 22 marks the beginning of winter in the Northern Hemisphere.

Like in the Islamic calendar, months in the Jewish calendar are based on the phases of the Moon. Each month begins with the appearance of a Crescent Moon after the New Moon phase and lasts for a full …