Characters
If every day were Christmas day By some fantastic trick If every day were Christmas day We’d all be bloomin’ SICK.
— Eric • Do Not Adjust Your Set

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Imagine Christmas every single day, and Eric says we'd all end up sick of it. The cheeky rhyme treats endless festivity as too much of a good thing. Even joy, it suggests, needs some ordinary days around it.
Context reviewed