Turning five is one of the hardest birthday milestones for us mommas as much as it a celebration for our children. Five marks the age children move away from infancy to school age and take their first steps into the world. It was also the hardest birthday for me as mom. A few days after her 5th birthday, I emailed this “The Last Night You Were 4” letter to my daughter that I wrote at midnight on her birthday. She has an email address waiting for her to grow up, full of pictures, stories, cute sayings and letters like this. (Heaven not Harvard shares links as a participant in affiliate…