# Date Trainer

> Learn to calculate the day of the week for any date using the Doomsday Algorithm. (iPhone/iPad app by Jubbly.)

- Source: https://appshunter.io/ios/app/date-trainer/id1446226198 (this page in markdown: same URL + `.md`)
- Developer: [Jubbly](https://appshunter.io/developer/533054332)
- Category: Education, Utilities
- Price: Free
- Rating: 4.00/5 from 3 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.1 · 2 MB
- Languages: American English
- Released: 2018-12-11
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/date-trainer/id1446226198/reviews.md

## What is Date Trainer?

Based on the Doomsday Algorithm developed by the great Professor John Conway, Date Trainer allows you to hone your skills as you wow your friends by successfully naming the day of the week for any date from 1800 to 2200.

Beat your best time.

Check your method against the calculated values the app presents.

Save your own mnemonic for special dates in the Doomsday List.

## Key features

- Calculate day of week for dates 1800-2200
- Practice and beat personal best times
- Verify calculations against app results
- Save custom mnemonics for special dates
- Utilizes Doomsday Algorithm

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/date-trainer/id1446226198/reviews.md

### 4/5 — Great app but …

*2022-05-31, version 1.9*

Eventually I end up having to clear data (uninstall & reinstall) because the calendar will be incorrect. Not sure why, but the fresh install always clears it up.

### 5/5 — Very Nice Training

*2022-03-06*

This app helped me a lot reviewing my calculations!

### 3/5 — Century Range Not Working

*2022-01-29, version 1.6*

Setting Century Range does not seem to effect which years the dates are randomly selected from.

### 5/5 — Niche but terrific

*2019-04-06, version 1.4*

Among the most useful things I’ve downloaded. Totally beats having to google “August 24 1842 day of week” or whatever. No ads and easy to use. My only suggestion is increasing the available of centuries (preferably all of them). Thanks for making something awesome!

### 5/5 — Incredible!

*2018-12-11*

Well, consider my friends wowed! This is an excellent party trick to out-geek the geekiest geek. Highly recommend.

## Frequently asked questions about Date Trainer

### What is the Doomsday Algorithm used in Date Trainer?

The Doomsday Algorithm is a method for calculating the day of the week for any given date. Date Trainer implements this algorithm to help users learn and practice this skill.

### What dates can I calculate the day of the week for with Date Trainer?

Date Trainer allows you to calculate the day of the week for any date between the years 1800 and 2200, covering a wide historical and future range.

### Can I save my own notes for specific dates in Date Trainer?

Yes, Date Trainer includes a feature to save your own mnemonics for special dates in the Doomsday List, helping you remember them more easily.

### How does Date Trainer help me improve?

You can beat your best times and check your method against the calculated values the app presents. This provides a clear way to track your progress and accuracy.

### What is the rating and update frequency for Date Trainer?

Date Trainer has a rating of 4.0 stars from 3 ratings. It was last updated on February 6, 2022, indicating a moderate update frequency.

### Is Date Trainer available on all devices?

Date Trainer is supported on iPhone, iPad, and iPod, making it accessible to a wide range of Apple users.

### Does Date Trainer have ads?

No, Date Trainer does not contain advertisements, providing an uninterrupted learning experience for users.

### What is the age rating for Date Trainer?

Date Trainer has an age rating of 4+, making it suitable for a broad audience including younger learners interested in educational games.

## Version history (last 5 releases)

### 1.9 — 2022-02-06

Improved support for Dark Mode

### 1.8 — 2022-02-04

Fixed a crash bug in Century Range selection

### 1.7 — 2022-02-01

Fixed an issue with the century range settings

### 1.6 — 2022-01-19

Added better randomisation

### 1.4 — 2018-12-17

Fixed a bug when saving Doomsday Date titles.

## Apps similar to Date Trainer

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [bitrig](https://appshunter.io/ios/app/bitrig/id6747835910) | 3.3 (56) | Free | Education |
| [Learn Chinese \| LingQ](https://appshunter.io/ios/app/learn-chinese-lingq/id1218127870) | 4.1 (22) | Free | Education |
| [Ginkgo Memory & Brain Training](https://appshunter.io/ios/app/ginkgo-memory-and-brain-training/id1455760861) | 4.6 (66) | Free | Education |
| [PORO - Spanish Vocabulary](https://appshunter.io/ios/app/poro-spanish-vocabulary/id1527247903) | 4.5 (19) | Free | Education |
| [PORO - Italian Vocabulary](https://appshunter.io/ios/app/poro-italian-vocabulary/id1527248138) | 4.6 (10) | Free | Education |
| [Ling Live - Learn Thai Easily](https://appshunter.io/ios/app/ling-live-learn-thai-easily/id1533645545) | 5.0 (4) | Free | Education |

## More apps by Jubbly

- [Tomato Timing Backup Timer](https://appshunter.io/ios/app/tomato-timing-backup-timer/id806029632)
- [Tomato Race Registration](https://appshunter.io/ios/app/tomato-race-registration/id1489542714)

All apps by Jubbly: https://appshunter.io/developer/533054332

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*