While Tina Fey was a writer on Saturday Night Live (1975), she appeared in a sketch about a pill "Annuale" that made women have their period once a year. This is similar to the one that Avery mentioned, "Dodecacil" (Dodeca- is a prefix meaning 12).
The man Liz talks to at Floyd's wedding is Astronaut Mike Dexter from her fantasies (John Anderson). His first name is Mike, although he says he is a lawyer.
The bible passages that Liz reads after I Corinthians 13 are portions of Genesis 38:9, Exodus 4:25, and Genesis 31:15.
Wesley tells Liz they are just like "Russ and Rebecca from 'Chums'", which would be the British version of Ross and Rachel from Friends (1994).
Frank's trucker hat says "Pocket Dialer".