Julian Calendar
View Julian dates with widgets
Julian Dates at a Glance
Julian Calendar is the all-in-one app for viewing and converting Julian dates. Whether you work in aviation, military, astronomy, or food manufacturing, this app gives you instant access to Julian day numbers with Lock Screen and Home Screen widgets.
Julian Date Features
Date Conversion
- Today’s Julian date — See the current Julian day number instantly
- Date converter — Convert any date to Julian and back
- Multiple formats — Julian Day Number, ordinal day of year, and more
- Historical dates — Look up Julian dates for any past or future date
Widgets
- Lock Screen widget — See today’s Julian date without unlocking
- Home Screen widget — Julian date always visible on your home screen
- Multiple sizes — Choose the widget size that fits your layout
Who Uses Julian Dates?
| Industry | Use Case |
|---|---|
| Aviation | Flight planning and scheduling |
| Military | Date references in operations |
| Astronomy | Star observation logging |
| Food industry | Expiration date tracking |
| Manufacturing | Production date codes |
| IT / Computing | Date calculations in systems |
| Emergency services | Incident date logging |
What is a Julian Date?
A Julian date represents the number of the day within the year (1-365/366). January 1 is day 001, February 1 is day 032, and December 31 is day 365 (or 366 in leap years). This format is widely used in industries that need simple, unambiguous date references.
What Users Are Saying
“Essential for my aviation work. The widget is incredibly convenient.”
“Finally a clean Julian date app with proper widgets.”
Rated 4.7/5 stars — The #1 Julian date app