Tasmeen is a month on the Vulcan calendar.

Spock underwent his kahs-wan ritual during the month of Tasmeen in the Vulcan year 8877. (TAS: "Yesteryear")

Months of the year
Earth months: January • February • March • April • May • June • July • August • September • October • November • December
Qo'noS months: Maktag • nay'Poq
Vulcan months: Tasmeen