Some of the press coverage of this Blondie thing seems to have missed the fact that though Blondie and Dagwood are celebrating an anniversary, it's the strip (not their marriage) that has been going on for 75 years. The first Blondie strip by Murat "Chic" Young appeared on September 8, 1930. Blondie Boopadoop — that was her maiden name — was courted by Dagwood Bumstead for a time and they finally tied the knot on February 17, 1933 in the strip from which the above panel was taken. Their first kid, Alexander, was born a year later.
In the meantime, the folks in Mutts get their invitation to the Big Bumstead Bash. And more characters show up in today's Blondie strip. (It's really tricky linking to some of these.)