Hello,
If you turn off URL SEF routing, you will get the basic URL.
Of this kind:
https://www.yourdomain.com/index.php?option=com_icagenda&view=event&id=1:event-title&Itemid=153&date=2026-01-21-14-37
This non-SEF URL is permanent.
But linked to a specific Itemid.
If you want it for all cases, to the best is to create a menu item of type list of events (which could be a hidden menu item) and with no filtering options to be able to display any events.
Then, you can use this menu Itemid.
If you need to use a SEF URL, so it's still possible with the alias used for this specific menu item.
Example:
https:www.yourdomain.com/specific-menu-all-events/[EVENT_ID]
of the event.
Or with a specific date:
https:www.yourdomain.com/specific-menu-all-events/[EVENT_ID]/2026-03-28-13-30
Where [EVENT_ID] is the ID of the event.
Hope this helps for the task you want to achieve?
Best regards,
Cyril