Hello @dondada A Warm Welcome to the Candy Friends section of our friendly King Community
Just wonted to make sure about the game you are talking about... you have mentioned that you are playing "Candy Crush game" and you do not have "Holiday Calendar"!! Did you meant the "Candy Friends" game but, forgot to specify the "Friends" part?
If you are playing Candy Friends game, try this --> Force close the App ---> Clear cookies / cache ---> Restart your device after shutting it down for 2 to 3 minutes. Now, log back into the game and check if the event is back. If not, shut it down again for 1 to 2 more times and check! This worked for few other players, may be it would be for you too!!