NOTE: Events are only available on mobile (Android/iOS) and Steam.

Assets are required for each event and they are typically available 1 hour before start time. Reboot your game on a strong internet connection to check for new assets.
Each event has a minimum required season. This is typically Season 7, but it can vary.
Coming Soon / Countdown no longer shows
The badge / icon for events can disappear after syncing your game to the cloud, however it doesn’t affect your actual access to the event. Just be sure to check for assets and reboot the game after event start time.