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Doomsday calculator memory app analytics for January 17

Doomsday calculator memory

Doomsday calculator memory

  • Joao Vianna
  • Apple App Store
  • Free
  • Education
In 1970, British mathematician John Conway devised a way to quickly calculate the weekday of any given date without the help of calculators, computers, or calendars. This app helps you to practice and memorize.
Doomsday calculator memory

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Doomsday calculator memory Ranking Stats Over Time

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Doomsday calculator memory Ranking by Country

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January 17, 2026