Yeah, like Eirikur, I was a bit confused at first, since I looked at the question on the 22nd. I also wasn't sure what part of the date the number was supposed to represent, so I tried dayofyear, which didn't match anything. I also tried week, which was very close to the day of the month (the 22nd was in week 21), but didn't match any of the query results.

Then I realized the question was intended for the 25th, and went with the right answer. 🙂