The document describes the origins of the names of the months in the modern Gregorian calendar. January is named after Janus, the Roman god of doorways. The other winter months also have Roman or Latin origins, such as February coming from a Latin word meaning purification. The spring and summer months reference Greek and Roman mythology, being named after gods like Mars, Venus, and Juno or describing the seasons. September through December retained their numeric names from the original Roman calendar despite calendar reforms that added January and February earlier in the year.

1. January is named after Janus who is considered as the
God of doorway in the Roman Mythology
February has its origin from Latin and means Purification
March owes its name to Romans and is named
after Greek God of War - Mars
April is supposed to be the month when trees and flowers
bloom and it is sacred to Goddess Venus
May is said to be a Greek Goddess of fertility
June gets is name after Roman Goddess Juno
who is said to be the wife of Jupiter

2. July gets its name in honour of Julius Caesar
August gets its name in honour of Augustus Caesar
September was originally the seventh month. Even after the inclusion of
January and February which were later added, there was no name change
October was originally the eighth month. It also retained its name
subsequent to January and February additions to the calendar.
November also retained its name.
It was the ninth month in the original calendar
December also retained its original name. It was the tenth month in
the original calendar when January and February were not there