Saturday Night Live premiered this week in 1975. In honor of their anniversary, LAist is going to show a clip from the show each night this week at midnight and also list what happens each day during the week that leads to the show being on the air Saturday night. Have favorite clips of your own? Submit them here. Today's clip is a Spartan Cheerleader skit featuring Will Farrell and Cheri Oteri.

Saturday:

* With the show still far from finalized, the day begins with a run-through, with props, in front of Lorne Michaels.

* After the run-through, the cast and crew find out which of the sketches are in the dress rehearsal, and which are cut. The writer/producer deals with any changes.

* This is followed by a dress rehearsal performed in front of the studio audience, which lasts from 8 p.m. - 10 p.m. (or sometimes later) and contains approximately twenty minutes of material which will be deleted from the final broadcast.

* Lorne Michaels uses firsthand observation of the audience reaction during the dress rehearsal and input from the host and head writer to determine the final round of changes, re-ordering sketches as necessary.

* The live show then begins at 11:30 p.m. Eastern Time, but some markets will delay airing.