What Is The Rarest Zodiac Sign 2024. For starters, the two least common birthdays in the calendar, december 25 and. (july is the second most common.) leo season runs from july 23 to.

To determine this, we looked at data from the centers for. Due to the crossover period between january and february being the shortest astrologically and therefore resulting in fewer birthdays, the rarest sign of the zodiac is.