Well, this temporarily answers the question on many minds…
Burl was originally supposed to graduate in 1966… so he was born in 1948… or possibly late 1947.
That means today he’s 64 or 65.
Then again, this strip has almost no continuity… Julie said it’s set in the 1990’s, but some days it’s obviously this century…It’s summer one day and winter the next.
Things like their anniversary, and Burl’s birthday, show up in different months…and they’ve referred to being in their 50’s.
They also have a daughter who dates a college guy… possible but not likely, if Joy is over 60.
So all we really know about their ages is …. they’re old enough to know better than to act the way they do.