Julianator

Julian Day of Year Calculator

RM4.90 · Designed for iPad. Not verified for macOS.

This app converts a date between Julian Day of Year and Gregorian. For example, September 11, 2022 converts to 2022-254 and 2022-254 converts to September 11, 2022. This app will convert both directions. Julian Date for this app refers to the day-of-year number (more properly, the ordinal date) in the Gregorian calendar, often used in mainframe computer systems, the military, and the food industry. (Note: this app does not used the term Julian Date to refer to the astronomy definition which is calculated from 4713 BC) Features a simple clean interface with pickers for the dates. The app also features a monthly view allowing a quick view of both Gregorian and Julian days for the entire month. Widgets are available for both the Home Screen and the Lock Screen to display the current day of year. A Watch app is available that includes a date converter and complications to display the current day of year. Note: The app's icon does not change to reflect the current day. Privacy Policy: https://julianator.brightdaydigital.com/privacy Terms of Service: https://julianator.brightdaydigital.com/terms

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Support for iOS 26 Liquid Glass

Version 4.7

The developer, Bright Day Digital LLC, 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.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    Accessibility

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

    Information

    Provider
    • Bright Day Digital LLC
    Size
    • 4.6 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 17.4 or later.
    • iPhone
      Requires iOS 17.4 or later.
    • iPad
      Requires iPadOS 17.4 or later.
    • Mac
      Requires macOS 14.4 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.1 or later.
    • Apple Watch
      Requires watchOS 10.4 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2025 Bright Day Digital LLC
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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