Quix,
I think you may be referring to the 40 Days of Life campaign - hugely successful!!! All Christians, united in fasting & prayer twice a year saving babies, changing hearts, & shutting down clinics. I don’t know where you live but there may be a campaign in your area since it’s become an international movement.
What I’m referring to may have been a part of it but I’m a bit skeptical.
The groups I heard about sounded very local and very spiritually intense.