Prime Numbers on the Calendar
Overview Each year, if the prime-numbered calendar dates were counted collectively, seventy-two prime numbers occur on the calendar, ranging from January 2 each year through December 25 in common years or December 24 in leap years (367 is the next prime number, which implies January 2 [or 1] of the following year). Since seven is prime, all numbers divisible by seven except seven are composite. Therefore, January 7 does not share a day of the week with any other prime-numbered date of the […]https://novatopflex.wordpress.com/2026/10/16/prime-numbers-on-the-calendar/