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Interactive Birth Calendar Highlights North Rhine-Westphalia’s Rarest and Most Common Birthdays

The new tool gives users access to Statistisches Landesamt data showing December 25 as the rarest birthday, with September 20 emerging as the most common.

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Overview

  • The interactive birth calendar launched on June 10, 2025, allows users to check how common their birthday is across North Rhine-Westphalia or by local region.
  • Official data from 2000 to 2024 show an average of about 300 babies born each December 25, making it the state’s rarest birthday.
  • Analysis reveals September 20 averages 492 births per year and that July through September account for the highest birth volumes overall.
  • Births drop sharply on weekends and public holidays, particularly on Christmas Day and New Year’s Day.
  • Planned Caesarean sections and induced births often scheduled on weekdays and on numerically appealing dates like February 2 and 22 skew the distribution of birthdays.