Hearts and Hooves Day (event)

Hearts and Hooves Day is the fictional event  in My Little

Pony:Friendship is Magic similar to Valentine's Day.

Orgin
The orgin of Hearts and Hooves Day started after a love potion was given to a prince and a princess. They fell madly in love.

It was later revealed that the kingdom of the prince and princess failed becaus a love poison was given to them instead.