January 75? What?

It's Keenspot standard to interpret all comic filenames as dates.

Adventurers! was first hosted elsewhere, I think, and Webby then chose to number his comics. When he switched to Keenspot, the old comics were kept under the same name, but he started using Keenspot's official convention for new ones.

I don't think it's a major issue, really. It's easy enough to see the real number.