In Estonia, every 14th of March, Mother Tongue Day is celebrated in honor of Kristjan Jaak Peterson, a pioneering figure in Estonian poetry. This day is a nod to the blossoming of the native language, appreciating its poetic roots and vibrant history. Estonians indulge in literary events and cultural festivities, celebrating Peterson’s legacy and the linguistic richness of their country.

• エストニア限定
• 最初のリリース 2023/02/21
• 3月 11 → 3月 14 年に一度
• https://en.wikipedia.org/wiki/Kristjan_Jaak_Peterson