Prepare before the changeover
Seasonal menu work is easier when changes can be drafted before they are published. Build the next version, confirm descriptions and pricing, then publish when the seasonal menu begins.
Keep reusable structure
Do not throw away categories or items that may return. Archive or duplicate the structure so the next seasonal change starts from a useful base.
Coordinate supporting content
A seasonal menu often comes with a homepage highlight, QR destination, promotion or signage update. Keeping those connected reduces mismatched information.