If automatic subscription does not work, you can subscribe to a calendar manually.
On the Kalendarze page, select a calendar you like.
Click Wybierać.
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 Dodaj do moich kalendarzy.
You will be taken to Moje kalendarze page. On the calendar you just added, click next to Pobierz and select Skopiuj adres do schowka.
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