JulianCal

JulianCal

Julian Day & Batch Codes

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Free

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Details

  • Released
  • Updated
  • January 16, 2026
  • January 25, 2026

Features

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About

JulianCal is the ultimate app for calculating and displaying the Julian Day of the year, an essential tool for production, logistics, and batch tracking. KEY FEATURES Real-time Julian Day • Display Julian Day of the year (1-365/366) • Automatic updates every minute • Leap year indication Customizable Batch Code • Generate automatic batch codes with custom prefix • 2 or 3-digit format for Julian Day • One-tap copy to clipboard Julian Day → Date Converter • Convert instantly from Julian Day to calendar date • Support for years 1900-2100 • Detailed info: day of week, week number, quarter Interactive Calendar • View calendar with Julian Day for each date • Select any date to see details • Switch between monthly and weekly view Year Progress • Visualize percentage of year passed • Animated progress bar • Days remaining until year end Statistics & Information • Week number of the year • Current quarter (Q1-Q4) • Days remaining in current year • Julian Day Number (since January 1, 4713 BC) USE CASES Production & Manufacturing: Product tracking and batch codes Logistics: Shipment organization and expiry dates Agriculture: Harvest planning and crop cycles Project Management: Working days and deadlines Science & Research: Astronomical calculations FEATURES • Modern and intuitive interface • Automatic light and dark theme • Works offline • Quick copy to clipboard • Full Italian and English support • Lightweight and fast • Free app with discreet ads PERFECT FOR • Production managers • Logistics operators • Project managers • Farmers and gardeners • Researchers and students • Anyone needing quick Julian Day calculations Download JulianCal now and simplify your work with Julian Days!
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What's New in JulianCal

1.3.0

January 25, 2026

Redesigned interface + 4 new languages (Bengali, Malay, Filipino, Amharic)! Now supporting 27 languages worldwide. Download now!

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