From Reuters -
Among the North American records set by Revenge of the Sith were best one-day, two-day, three-day and four-day sales. It also managed to beat the five-day record. After opening just after midnight on Thursday, "Revenge of the Sith" earned $50 million during its first day, beating the $44.8 million tally for "Shrek 2" last year. The record-breaking streak continued into the second day ($83.8 million) and third day ($124.7 million). Its four-day haul of $158.5 million beat the old mark of $134.3 million set by 2003's "The Matrix Reloaded" -- as well as the five-day mark of $152.4 million set by 2004's "Spider-Man 2."