Continuity: Rachel's year of birth is inconsistent. Her 30th birthday in this episode (2001) implies that Rachel was born in 1971. However, her 29th birthday in "The One Where Rachel Smokes" (1999) implies that she was born in 1970. Also, Rachel says she is 28 in "The One with the Fake Party" (1998) implying she was born in 1970. But 15 months earlier in "The One Where Rachel Quits" (1996) Chandler says Rachel is 28, implying she was born in 1968.