A perfect month or a rectangular month designates a month whose number of days is divisible by the number of days in a week and whose first day corresponds to the first day of the week.[1][2] This causes the arrangement of the days of the month to resemble a rectangle. In the Gregorian calendar, this arrangement can only occur for the month of February.
- ^ Norris, Phil (1 February 2021). "February is looking to be a perfect month on paper". GloucestershireLive. Retrieved 1 February 2021.
- ^ de La Taille, François (31 January 2021). ""Mois parfait", palindrome: quand février 2021 rend fous les fétichistes des chiffres". BFMTV.com (in French). Retrieved 1 February 2021.