“I mean, there is a reason its initials are VD. I bet you more people contract syphilis on Valentine's Day than on any other day of the year. What a cause for celebration.”

“I love you more than a hooker loves free VD testing day at the clinic”

“You just can't live that negative way.You know what I mean. Make way for the positive day. Cause it's a new day...”

“I wouldn't cut you out of my life Clary, any more than I would cut off my right hand and give it to someone as a Valentine's Day gift."Gross," said Clary. "Must you?"Simon grinned. "I must.”

“Valentine!""You mean father. I despise this modern habit of calling one's parents by their names.""What I want to call you is a hell of a lot more unprintable than your name."- Clary Fray and Valentine Morgenstern (City of Ashes)”

“There was another reason why I wasn't ready to tell you all this that night in the airport.""What other reason?""Guess what today is?""Um, Tuesday?""Even better. It comes around once every four years. Last day of February? Ringing any bells?" He let that settle for a long moment before he curled his face into the half grin she loved so much. "It's leap day, baby.”