Thornton, Colorado, 1960s

Thanks to the Denver Public Library’s Digital Collections, where we came across these two photos, we know that Muriel Sibell Wolle took the photos at the Intercession Episcopal Church in Thornton, Colorado, but we don’t know much context behind the photos (though everybody’s dressed nice, it’s probably not Easter Sunday, given how sparsely filled the parking lot is) or when they were taken. So based on what we see in the photos, can we narrow down at least the year?