What'S A Calendar Month. A calendar month is one of the twelve specific periods of time into which a year is divided, such as january, february, etc. The period from a day of one month to the corresponding day of the next month if such exists or if not to the last day of the next month (as from january 3 to february 3 or from january 31 to.
One of the twelve named monthsโฆ. A month is defined as a period of roughly four weeks,.