android VS Etar Calendar

It connect * TICE – Secure GPS Location Sharing with Friends (version 2.3): Meet up and locate your friends, family and colleagues on a map * PinPoi (version 1.7.6): Import and manage points of interest * Open TimeLimit (version 5.4.1): Simply limit the usage duration * Forkyz (version 15): Crossword puzzles application, download and play. * Tasks.org: Open-source To-Do Lists & Reminders (version 12.0): Fork of Astrid Tasks & To-Do List * RunnerUp (version 2.4.5.0): Track your sport activities using GPS * SaveTo… (version 1.15.2): Save shared image or pdf to selected directory * Simple Alarm Clock (version 3.10.03): Improved alarm clock * Discreet Launcher (version v5.4.1): Enjoy a clean home screen while accessing everything in an instant * Firefly III Mobile (version 5.0.1): Mobile wrapper for Firefly III * Ad-silence (version 0.4.0): Silence ads in Accuradio, Spotify & Tidal. Lightweight & minimal(under 150kb). * Meteocool - Rain radar (version 2.2): Free & Open High-Accuracy Local Weather Radar and Forecasting * Evil Insult Generator (version 3.3): This is the greatest insults app you can get! * ANOTHERpass (version 1.5.3): Another way to manage passwords * Simple Music Player (version 5.9.0): A clean music player with a customizable widget. * croc (version 1.10.1): Easily and securely send things from one computer to another * Look4Sat: Satellite tracker (version 2.6.0): Radio satellite tracker and pass predictor for Android * Bitcoin Wallet (version 9.03): Store digital currency * UnCiv (version 3.18.16): 4X civilization-building game * Termux:GUI (version 0.1.4): A plugin for Termux to use the Android GUI from terminal applications. * Bitcoin Wallet [testnet3] (version 9.03): Testing version of Bitcoin * Silence (version 1.9.2): Block unknown callers * Specie (version 1.01): Currency conversion * RadarWeather (version 4.6): Lets you watch the weather for cities and locations you are interested in. * Thorium a PeerTube client (version 1.11.0): a PeerTube player * Currency (version 1.40): Currency conversion * PCAPdroid (version 1.4.5): No-root network monitor and traffic dump tool for Android devices * GymRoutines (version 0.1.0-beta09): Open-Source fitness tracker for Android. * DeepL (version 7.1): Unofficial Android App for DeepL Translator * Etar - OpenSource Calendar (version 1.0.29): Etar is a material designed open source calendar, for everyone! * Catima — Loyalty Card Wallet (version 2.13.1): For your barcodes, memberships, loyalty programs, coupons and tickets.

I use Etar with DAVx5 to sync from my CalDAV calendars. You can use it by itself too, but then obviously there is no sync between applications (I use Thunderbird on my desktops).

"schedule for the classes, the exams dates" -https://github.com/Etar-Group/Etar-Calendar -I use SimpleCalendar but it seems to not be on f-droid anymore?