1997 Film Timeline vs Real Life

Unless I’m really missing something, the 1997 film seems to skip a day of the actual ship’s chronology. The ship departed Wednesday, April 10 from Southampton and hit the iceberg on Sunday, April 14.

The timeline in the film is:

Wednesday, April 10: Rose and Cal board, Jack wins his ticket, the ship leaves Southampton, and later calls at Cherbourg.

Thursday, April 11: ship calls at Queenstown (“the next day we were steaming west off the coast of Ireland”), Jack sees Rose for the first time when she steps onto the deck outside the Palm Court. Later that night (?) she tries to jump. Cal invites Jack to dinner the next night.

Friday, April 12: Jack and Rose spend the day on the boat deck prior to him attending the first class dinner and later the steerage party.

Sunday, April 14: Cal flips the table at breakfast, Ruth dresses (down) Rose for church, the “I’m flying” scene, ship hits the iceberg.

Unless I’m missing something, the film (prior to the sinking) only depicts 4 separate days, but the actual ship sailed for 5 days (Wednesday to Sunday, sank on Monday). The only logical spot I can see for the extra day to be made up in the film is if Jack’s first sighting of Rose outside the Palm Court is on Thursday, but she doesn’t try to jump until the next evening. However this isn’t especially clear in the film and I don’t believe the deleted scenes clarify this either.

Any other theories about the missing day?