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Calculating Children’s Milestones

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This tool calculates the dates of major celebrations following a child’s birth.
Date of Birth
Year
Month
Day
Gender

Notes



  • The “First Seasonal Festival” (Hatsu Sekku) originally refers to the first seasonal festival a child celebrates after birth; however, in this context, if a child celebrates a seasonal festival before their first shrine visit (Omiya-mairi), the following year is considered the “First Seasonal Festival.”

  • Regarding the Shichi-Go-San celebration, while it was traditionally celebrated based on the traditional Japanese age system (age 1 at birth, increasing at each New Year), it is now commonly celebrated based on the completed age in years. This site uses the completed age in years for calculations.

  • You can enter dates in the Japanese calendar system starting from the date the Gregorian calendar was adopted in January 1, Meiji 6 (1873).


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