13 Month Fixed Calendar

2.2.3

erkantr

2.82

155 reviews

10,000+
Downloads

Free

13 months, 28 days, every date same day.

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Pros & Cons

Unique 13-month, 28-day calendar structure that aligns weekdays with dates
Fixed weekday-date pattern across years for predictable planning
Dark mode and customizable theme colors for better readability
Multilingual support expanding accessibility to a global audience

Lacks holidays, events, widgets, and other common calendar features found in some competitors
Relatively modest rating compared to mainstream calendar apps
Not ranked in any top lists

About 13 Month Fixed Calendar

13 Month Fixed Calendar is a productivity app developed by erkantr.

Download Statistics

13 Month Fixed Calendar has been downloaded 21 thousand times. In the last 30 days, the app was downloaded 960 times.

User Ratings

13 Month Fixed Calendar is rated 2.82 out of 5 stars. The rating is based on 160 ratings.

App Information

13 Month Fixed Calendar is FREE to download. The APK download size is 4.62 MB. The latest version available is 2.2.3. The last update was on May 13, 2025.

Technical Requirements

The app has a content rating of Everyone. The app has been available on Google Play March 2024.

Description

The International Fixed Calendar is a calendar system where every year aligns with the same days of the week and dates, ensuring consistency in weekly patterns. It was first proposed by Moses B.

More data about 13 Month Fixed Calendar

Price	Free to download
Total downloads	21 thousand
Recent downloads	960
Rating	2.82 based on 160 ratings
Ranking	Not ranked
Version	2.2.3
APK size	4.62 MB
Number of libraries	?
Suitable for	Everyone
Ads	NO ads

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Google Play Rating history and histogram

Rating history

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Downloads over time

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13 Month Fixed Calendar has been downloaded 21 thousand times. Over the past 30 days, it averaged 32 downloads per day.

Changelog of 13 Month Fixed Calendar

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Developer information for erkantr

erkantr

erkannt24@gmail.com

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Comments on 13 Month Fixed Calendar for Android

★★★★☆ Victor Balderas · Apr 14, 2025

I like the 13th month concept. You are ahead a few days. Writing this review, and currently the app says it's on day 21 of April. When it would actually be on the day sixteen. Yes I did the comparison with the Gregorian calendar and traced back from February 2026 the following year to come, the month is a perfect alignment with the days matching perfectly. Aside from other comments editing dates and setting reminders would be an excellent edition. Keep it up! Looking forward to new improvements

★☆☆☆☆ SageStormCloudMoonGoddess · Apr 3, 2025

I'd give it zero stars, but that's not an option. This app Does Literally Nothing except Show you an image of the Calendar. It needs to be taken down.

★★☆☆☆ Tamara Rogers (Calgary) · Apr 15, 2025

I appreciate that it shows Sol, but there is zero explanation as to why it's not showing today's date. It would be nice to zoom in on a month and have the moon phases showing.

★★☆☆☆ Ladislav Piaček · Oct 25, 2025

Please, if you can add possibility to set starting day of calendar from official calendar, so I can really use it then. I want to match weekdays each eyar. e.g. 30th december 2024 gregorian = 1. January 2025 in fixed.

★★☆☆☆ RICLEY75 · Mar 3, 2025

Page looks good but 7,14,21,28 are missing in every row on every month until I turn my phone to view in horizontal view then the number come back, but also it's not on the right date and the day not highlighted on which actual day it is and more than one month has the same day highlighted, what's what, please fix I really like this concept, and your is the only of its type. It would be great to have a settings menu to change basics like to fit on phone screen

Google Play Rankings for 13 Month Fixed Calendar

This app is not ranked

Technologies used by 13 Month Fixed Calendar

9 permissions

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