OhThatsA App

An app to help you learn how to calculate day of the week from any date.

Mostly made to try out Dart/Flutter, source can be found on my Gitea:
https://gitea.broodjeaap.net/broodjeaap/OhThatsA

The app is available on the Google Play store.

App

Practice overview

An instruction page

‘Month’ practice in progress

Method

The day of the week can be caculated by:
(day value + month value + year value + century value + leap year value) % 7

Every one of these value comes from a set of constants or is calculable from the date.
This app helps you practice memorizing and calculating these values.