In October 2016 Tegan O'Neil published the essay "One Hundred and Sixty Four Days" to their blog, The Hurting. On that day everything changed, for her and the thousands of people who made the essay a viral sensation. Tomorrow Is Always the Best Day of My Life is the book that emerged from that essay, written across the Fall of 2016 through the Spring of 2017, chronicling a turning point in the life of the author and a nation both.