This is my app, that can be installed from:

Windows version

Primary version.

English: https://www.microsoft.com/en-us/p/a/9pjw858v28w8
Jêzyk polski: https://www.microsoft.com/pl-pl/p/a/9pjw858v28w8

Android version

Converted to Android using Platform Uno, minimum 3.8.6.

Amazon store, https://www.amazon.com/dp/B087JVLLVG/ , or
Google store, https://play.google.com/store/apps/details?id=pkar.Anniversaries

privacy policy

https://github.com/pkar70/Anniversaries/wiki/Privacy-policy

For history (in Polish), see MainPage.xaml.cs file.