WeekdayWidget

Learn the Human Calendar trick

Only for iPhone

Free · Designed for iPhone

iPhone

Want to learn the ‘Human Calendar’ trick and quickly calculate the day of the week for any calendar date in your head? WeekdayWidget is the definitive platform for learning, training, and performing mental weekday calculation. It has never been easier to learn this skill- in addition to the comprehensive text and video tutorials, WeekdayWidget features an exclusive ‘Guided Solve’ mode that walks you step by step through the full process until you’re ready to solve on your own! The app also features: - Sleek user interface with unlockable themes - Training minigames for practicing individual steps in the full process - Speedrun mode based on official Memoriad categories - Text-to-speech functionality to emulate spoken performances - Fully customizable date range from 1600 - 2100 …and more! Whether you’re learning for a mathematics demonstration, training for Mental Olympics competition, or just picking up a neat party trick, WeekdayWidget’s flexibility makes it the ideal platform no matter the use case. ‘Doomsday’ algorithm inventor John Conway was famously able to calculate any weekday in under two seconds… Can you beat that?

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The developer, Jasper Murphy, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

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    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    • Provider
      • Jasper Murphy
    • Size
      • 35.6 MB
    • Category
      • Education
    • Compatibility
      Requires iOS 12.0 or later.
      • iPhone
        Requires iOS 12.0 or later.
      • iPod touch
        Requires iOS 12.0 or later.
      • Mac
        Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
      • Apple Vision
        Requires visionOS 1.0 or later.
    • Languages
      • English
    • Age Rating
      4+
    • Copyright
      • © 2025 Jasper Murphy
  • Privacy Policy

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