That's what happens when people don't get an education.
September, October, November and December get their names precisely because they were the 7th, 8th, 9th and 10th month of the Roman calendar.
- 1 Martius Named after Mars, the god of war
- 2 Aprilis Possibly derived from "aperire" (to open) or "Aphrilis" (from Aphrodite, the Greek equivalent of Venus)
- 3 Maius Named after Maia, a goddess of growth
- 4 Junius Named after Juno, the queen of the gods and goddess of marriage
- 5 Quintilis From the Latin word "Quinque," meaning five
- 6 Sextilis From the Latin word "sex," meaning six
- 7 September From the Latin word "septem," meaning seven
- 8 October From the Latin word "octo," meaning eight
- 9 November From the Latin word "novem," meaning nine
- 10 December From the Latin word "decem," meaning ten
The guy who messed it up by adding two more months to, you know, match the solar year, was King Pompilius who died peacefully in his bed.