This is true, the Titanic was due to arrive in New York on Wednesday April 17th. Some speculate that in an effort to show the possible speed of the Olympic class that the Titanic was going to arrive on Tuesday night. However realistically if the Titanic was going to do any speed run it would've did a one day full speed run on Monday or Tuesday to see what the Olympic class was really capable of. Due to how ships were docked in New York at the time, had the Titanic arrived on Tuesday night, it would've had to anchor off quarantine for until the morning, and that most likely would've just angered passengers as they could see NYC in the distance but still be stuck on ship. The Titanic was then due to sail back to Southampton on the 20th.