Does this Siri question work for you?

[Jimmy Guphanti]

Is Siri bad at math?

 

[tobefirst ⚽️]

"It was 9 hours and 25 minutes ago."

 

[sammich]

Yeah, it's definitely doing a calculation to the last 12-hour block. Asking it for days since any year will give you that. The parsing must be wrong. Should submit it as a bug.

 

[Newtons Apple]

You can do the same with any past date and it will give you a bad answer.

 

[Zxxv]

same here