WALLPAPER_JAN
If
Event from search starts
This Trigger fires a set number of minutes before the starting time of an event on your Calendar that contains a specific keyword or phrase in the event’s Title, Description, or Location. Ingredient will be based on the zone set in Google.
Then
Update device wallpaper
This Action will update the wallpaper on your Android device from the image URL you specify.
Explore more great ways to automate Google Calendar and Android Device