Please don't worry: the event didn't disappear.
Our game team just changed the order of the daily events and the exclusive event for the Cadillac Cien Concept will be held on Saturdays and Sundays from now on.
Here is an updated list:
Rezvani Beast X: Friday & Saturday
Cadillac Cien Concept: Saturday & Sunday
VLF Force 1 V10: Tuesday & Wednesday
Lamborghini Egoista: Wednesday & Thursday
Trion Nemesis: Thursday & Friday