Rearranging the letters of 'The Feast of Saint Valentine' (February 14, removed from calendar by pope in 1969) gives:
Fantasies? Net that fine love!
(by Mike Mesterton-Gibbons by hand) (2007) (pending approval)
Other related anagrams without their own page:
"Saint Valentine's Day" -> "Satan ties lad in envy." (by Joe Fathallah) (2004)
"Saint Valentine's Day" -> "I envy Nina's last date." (by Toby Gottfried / Joe Fathallah) (2004)
"Saint Valentine's Day" -> "A navy's intent: ladies." (by Mike Mesterton-Gibbons by hand) (2007) (pending approval)
"Leonardo DiCaprio to Propose to Bar Refaeli — on Valentine’s Day" -> "After 'alone' period and abandon poor coos - ' I love pretty Israeli'" (by Aronas Pinchas ) (2010) (pending approval)
"Valentine Day card" -> "Evidently a canard." (by Aronas Pinchas ) (2011) (pending approval)
"The Valentine's Day celebrations" -> "A decent, blest...any 'Love's in the air''!" (by Aronas Pinchas ) (2011) (pending approval)