He may have not even known about it. In hindsight, it seems important. But from the perspective of him taking office when he did, that would likely be the furthest thing from his mind.
That’d be my guess too.
"Allways speak the truth and you will never have to remember what you said before..." Sam Houston Texans, "We say Grace, We Say Mam, If You Don't Like it, We Don't Give a Damn!"