iCal Events Not Updating in Calendar After .ics File Update Question:

I am using an iCal link to send booking events to a calendar.
The process works as follows:

1. I generate a .ics URL for the bookings.
2. When I add this .ics URL as
   another calendar in a calendar application (e.g., Google Calendar,
   Outlook), all the events display correctly.

The issue arises when I create a new booking:

• The .ics file is updated successfully with the new event.
• However, the calendar where the URL was added does not reflect the
  updated events. It seems like the calendar application does not
  refresh or re-fetch the updated .ics file.

It seems like the calendar application does not refresh or re-fetch the updated .ics file.

What I’ve Tried:

1. Verified that the .ics file is updated correctly by checking the URL
   directly in a browser.
2. Waited for a period of time to see if the calendar syncs
   automatically.

My Questions:

1. Is there a way to force calendar applications to refresh or re-fetch
   the updated .ics file?

2. Are there specific settings or headers required in the .ics file or
   server response to ensure the calendar updates regularly?

3. Could this behavior depend on the calendar application being used
   (e.g., Google Calendar vs. Outlook)?

Any guidance or best practices for resolving this issue would be greatly appreciated.