With L, C, and Baby we celebrate Sisters' Day the 2nd Monday after Mothers' Day. Brothers' Day is the 2nd Monday after Father's Day. L asked about Sisters' Day and I told her I was too stressed out to think about it, and we could celebrate it in the summer. Then my sister called and asked if L was excited about Sisters' Day because this would be the first year Baby and L would share it. After that I decided I could do the celebration this year. We marked Sisters' Day on May 16, and then began the preparations.
I like how at the end Paul Goodfellow talks about how studying the rare events (like early onset breast cancer) can help with more general problems.