Can no longer search for a specific date in Photos

I've been working on a project where every day, I type in the specific date for the past 10 years and tag the photos for that day (as a way to catch up on tagging photos that I previously missed).

Until about a week ago, I was able to type in a date to the search field (February 14, 2010) and it would pull up all the photos for that date.

Now, every date that I type in only comes up with the message "There were no results for "February 14, 2010." Try a new search."

I can find the photos (from that exact date) if I type just the month and year... but not by a single day.

Am I missing something?