Birthentine's Day

A holiday celebrated when your birthday is also Valentine's Day (February 14th)

Jane: "I can't believe tomorrow is Valentine's Day."
John: "Tomorrow is also my birthday."
Jane: "Oh, so you will be celebrating Birthentine's Day."

Birthentine's Day

A holiday celebrated when your Birthday is also Valentine's Day (February 14th).

Jane: "I can't believe tomorrow is Valentine's Day."
John: "Tomorrow is also my Birthday."
Jane: "Oh, so you will be celebrating your Birthentine's Day!"