If automatic subscription does not work, you can subscribe to a calendar manually.
On the Calendriers page, select a calendar you like.
Click Sélectionner.
If you are not logged in to WebCal.Guru, you will not be able to modify subscription settings and you will have significantly smaller selection of calendars. In this case, jump directly to Step 4.
Adjust the subscription settings if needed and click Ajouter à mes calendriers.
You will be taken to Mes calendriers page. On the calendar you just added, click next to Télécharger and select Copier l'adresse dans le presse-papiers.
On the home screen of the device, tap Settings.
Turn the device to portrait orientation, scroll down to Calendar and tap it.
Tap Accounts.
Tap Add Account.
Tap Other.
Tap Add Subscribed Calendar.
Tap the empty input field.
Tap Paste.
Tap Next.
Tap Save.
Updated 8 Feb 2023