I'm trying to locate a modern poem without success

Before he experienced scandal, Garrison Keillor did a daily piece called “The Writer’s Almanac” on my local NPR station, where he would talk about literature and then conclude with a poem. There was one that was fairly lengthy, from the viewpoint of a woman who married in the late 1960s or early 1970s and talks as she turns pages in a photo album, as they happily celebrate birthdays, have children, etc. and around 1975, the poem concludes with a line that is something like “this was around the time that the skies began to darken.”

I have investigated TWA’s website and poem search engines without success. Dopers?

you looked through the Writers Almanac archives
already?

Sort of. There’s no search engine there, that I could find, although Google does link to it. Found a lot of other poems, but not that one.

I found it. It was called “Bell Bottoms and Platform Shoes.”