It’s seems important to have markers—points along the continuum to clearly state something has ended and something has begun. And even though most people seem drawn towards delineations on some level, there’s something about having kids that really pushes the demand for recording the beginnings and the ends.
It starts with birth and quickly becomes first foods, words, and steps. Just as you record one marker another has already passed, and pretty soon you just can’t keep up. But today was a clear marker that’s pretty easy to name but hard to consolidate into a concise description that captures everything that was experienced.