Why am I seeing a date without images?

[Hamza25291388dqei]

The 28th is sticking out. It's not under any years and not showing any photos. I tried finding a photo on that date using Bridge.

 

[JohanElzenga]

Most likely it contained a photo, but you deleted it later because you did not want to keep it.

[Hamza25291388dqei]

Hmmm, so Lightroom Classic still keeps information on deleted (from catalogue) images? That sounds counterintuitive.

[JohanElzenga]

Restarting Lightroom should remove that info. If it doesn't, then that could indicate catalog corruption. Did you try to optimize the catalog?