Sunday Sun 20 June. Monday Mon 21 June. Sunday Sun 27 June. Monday Mon 28 June. Sunday Sun 4 July. Monday Mon 5 July. Sunday Sun 11 July. Monday Mon 12 July. Sunday Sun 18 July. Monday Mon 19 July. Sunday Sun 25 July. Monday Mon 26 July.
Sunday Sun 1 August. Monday Mon 2 August. Sunday Sun 8 August. Monday Mon 9 August. Sunday Sun 15 August. Monday Mon 16 August. Sunday Sun 22 August. Monday Mon 23 August. Sunday Sun 29 August. Monday Mon 30 August. Sunday Sun 5 September. Monday Mon 6 September. Sunday Sun 12 September. Monday Mon 13 September.
Sunday Sun 19 September. Monday Mon 20 September. Sunday Sun 26 September. Monday Mon 27 September. Sunday Sun 3 October. Monday Mon 4 October. Sunday Sun 10 October. Monday Mon 11 October. Sunday Sun 17 October. Monday Mon 18 October. Sunday Sun 24 October. Monday Mon 25 October. Sunday Sun 31 October. Monday Mon 1 November. Sunday Sun 7 November. Monday Mon 8 November.
Sunday Sun 14 November. Monday Mon 15 November. Sunday Sun 21 November. Monday Mon 22 November. Sunday Sun 28 November. Monday Mon 29 November. Sunday Sun 5 December.
Monday Mon 6 December. Sunday Sun 12 December. Monday Mon 13 December. Sunday Sun 19 December. Monday Mon 20 December. Sunday Sun 26 December. Monday Mon 27 December. Sunday Sun 2 January. This is to keep our current calendar aligned with the solar year and astronomical seasons marked by equinoxes and solstices. The Gregorian calendar consists of the following 12 months:. The word month is even derived from the word Moon. As far as we know, months were first used in Mesopotamia sometime between the years BCE and BCE to measure the natural period related to the lunar month , or synodic month, which is the time it takes for the Moon to go through all the Moon phases.
The Gregorian calendar has 4 months that are 30 days long and 7 months that are 31 days long. February is the only month that is 28 days long in a common year and 29 days long in a leap year. The Gregorian calendar has days in a common year , and days in a leap year. The ancestor of our modern calendar, the ancient Roman calendar , had only days. Our current Gregorian calendar and its predecessor, the Julian calendar , both have 12 months. The month names we use today are derived from the Roman calendar , which initially had only 10 months , with the calendar year starting in March Martius.
The Romans named some of the months after their position in the calendar year: September means the 7th month, October the 8th, November the 9th, and December the 10th month.
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