Valentine's Day in 1992, Harry's second year at Hogwarts, left a very deep impression on him for the rest of his life.
Because even after his entry into the wizarding world, this counted as a very peculiar day.
Harry had seen the Cupids of Muggle mythology: cute children, usually blond, with wings on their backs, bare bottoms, and bows and arrows in their hands.
He had never seen the wizarding world's Cupids, but from what Ron and the others had told him, he was certain they looked absolutely nothing like what he was seeing now.
Every one of those dwarfs wore a sullen expression. Although they had golden wings on their backs, those were obviously decorations. They also carried bows, arrows, and harps. But looking at them, Harry thought they resembled robbers more than gods of love.
Of course, Harry had initially treated the whole thing as an entertaining spectacle. At least, that was how he saw it that morning.
Those "Cupids" pushed open the classroom doors several times, then delivered a card or a letter.
The professors found this endlessly irritating, but most of the students thought it was great fun.
Why did most students find it fun, rather than all of them?
Because some unlucky souls happened to have Potions Class that day.
Potions Class consisted almost entirely of practical work, continually adding various ingredients to bubbling cauldrons, a large proportion of which required precisely measured quantities.
A little too much, and half a lesson's hard work might all go to waste.
And the commotion those "Cupids" made as they burst through the door was enough to make most young wizards jump.
As a result, Hogwarts set an all-time record that day for the greatest number of potions accidents.
"Hahahaha! Finally, someone other than me blew something up!"