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365 Days Calendar

365 Days Calendar

Julian & day tracker

23 ratings
7 reviews
🔧 Utilities
📊 Productivity
$1.99

Details

  • Released
  • Updated
  • March 27, 2023
  • January 10, 2026

Features

Developer

Cyberdeploy Inc.
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About

This utility app converts between Julian and Gregorian dates and tracks Julian Day Numbers. It's designed for users in fields like astronomy, military operations, and historical research who need precise date management for daily operations.

✓Julian to Gregorian date conversion
✓Gregorian to Julian date conversion
✓Julian Day Number tracking
✓Historical date reference management
✓Scientific date reference management
✓User-friendly interface
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What's New in 365 Days Calendar

2.0.0

January 10, 2026

New feature added to track events and countdown Now you can create events and make them as normal events or countdowns

User reviews

Most RecentHighest RatedLowest Rated

Day tracking

I like to keep abreast of the number of days left in the year. Your calendar does that. Thank you
Rosary AudioRosary Audio

Great tool

Use it almost daily
CJK. SCCJK. SC

Response from developer

I’m glad you found it useful. Thanks a lot for the feedback

Widget Creation

This is helpful, but it would be perfect if there was a widget that I could quickly glance and see “Day 248/365, Week 36” or something of the sort.. there’s literally no app on the entire App Store like that 😵‍💫
zachperardzachperard

Response from developer

Thank you for your feedback. I have now just released a new version with Home Screen lock screen widgets 🙏

Week Number

It would be nice if these calendars also had the week numbers alongside the Gillian date so you know what week you are in.
MacHead22MacHead22

Response from developer

Thanks for the feedback. I have added the week number to the calendar now

Solid

Simple and effective
SLIME96SLIME96

Response from developer

Thank you. Glad you liked the app

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FAQ

What is the price of 365 Days Calendar?

365 Days Calendar is a paid app priced at $1.99. This one-time purchase grants you access to all its features without any recurring fees.

Does 365 Days Calendar have ads?

No, 365 Days Calendar is ad-free. You can use all its functionalities without any interruptions from advertisements.

What devices is 365 Days Calendar compatible with?

365 Days Calendar is available for iPhone and iPad devices. It is designed to work seamlessly on Apple's mobile operating systems.

How often is 365 Days Calendar updated?

The latest version, 2.0.0, was released on 2026-01-10, indicating recent development activity. Users can expect ongoing support and potential future updates.

What is the age rating for 365 Days Calendar?

365 Days Calendar has an age rating of 4+. This means it is suitable for users of all ages, with no content restrictions.

What is the Julian Date Number (JDN)?

The Julian Day Number (JDN) is a continuous count of days and fractions of a day since the beginning of the Julian period. 365 Days Calendar helps you accurately track and convert to this system.

What are the main use cases for 365 Days Calendar?

This app is ideal for astronomy, military operations, food production, and historical research where precise date conversions and tracking are essential for operations and analysis.