Blondie started in 1930 -- but there's little of that decade in this sequence. Using the Facebook convention of Throwback Thursday is decidedly 21st century. And it's a great way to point out just how things have changed over the last 85 years.
Sure, the punch line is that there's one thing that hasn't changed. But it has in subtle ways.. When Dagwood was first shown at work (in the 1940's), there was a typewriter on his desk. If you look carefully, you'll see a computer flatscreen terminal in the corner of the final picture. So not everything remains the same in the world of Blondie.