If you're complaining about seasonal availability, the cheat menu allows you to toggle each individual season on, off or auto. If you're asking to do holiday events again on the same save file, you can generally only do them either once per year, or once per save file for more unique events (e.g. the Kashima Incident, Dorna family Christmas) - unless, of course, you use the console or save editing to set the flags used to track those events to undefined
.