It's been off my PBS for over a decade now. I think they last aired it maybe 2004 or 2005, before they adopted the national PBS Kids schedule; prior to that, my PBS had its own local schedule, and usually, Mister Rogers always came on before SST: both in the morning and afternoon.I don't think it's airing anywhere anymore.
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Christmas Music
Macy's Thanksgiving Parade
Sesame Street debuts on Netflix
Back to the Rock Season 2
Sam and Friends Book
Jim Henson Idea Man
Bear arrives on Disney+