I thought this was weird...please weigh in

Today I sat in a pew at a church in our new city with my spouse, and this time we seated ourselves right in front of the woman seated in the row behind us. Moments before the procession began, I saw from my peripheral vision the priest approach this woman right behind us. The priest, who is the rector at this church, leaned into the woman and told her "the solar eclipse will be mentioned briefly in the sermon today" (paraphrase). The woman replied with her thanks to the priest for letting her know in advance about the sermon.

What the heck could this exchange have been about???