SourdoughDay, not Saturday!

Befitting a resident of the SF Bay Area, I found a loaf of sourdough left at my door just now. Even though my door was open and I heard the rustling coming and going of someone, I assumed it was my next door neighbor and didn't get up to look. That would have solved the mystery of WHO IS LEAVING BREAD AT MY DOORSTEP EVERY FEW WEEKS!!!???!!!