First, delete the current calendar subscription from Google.
Log in to Google Calendar.
Google Calendar updates calendar subscriptions every 12 or 24 hours. There is no way for the user to force Google Calendar to update more often.
You can either wait up to 24 hours for Google Calendar to update. Or, you can do it manually by changing the subscription identifier (usually not recommended). When the identifier is changed, Google doesn't find the calendar in its cache and is forced to download it.
First, delete the current calendar subscription from Google.
Log in to Google Calendar.
Take a look in the panel in the left edge of the window.
If needed, open Other calendars by clicking to show the calendars.
Click to unsubscribe from that calendar.
Back at WebCal.Guru, go to My calendars and find the calendar subscription.
Open the menu by clicking and select Change subscription identifier.
Add the calendar with the new subscription identifier back to Google.
Click and select Add to Google Calendar.
You will be taken to Google Calendar. Log in if necessary.
Click Add.
Updated Wed, 08 Feb 2023 12:08:23 +0000 UTC