Savant syndrome in the context of "Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition"

A calendrical calculation is a calculation concerning calendar dates. Calendrical calculations can be considered an area of applied mathematics.Some examples of calendrical calculations:

• Converting a Julian or Gregorian calendar date to its Julian day number and vice versa (see § Julian day number calculation within that article for details).
• The number of days between two dates, which is simply the difference in their Julian day numbers.
• The dates of moveable holidays, like Christian Easter (the calculation is known as Computus) followed up by Ascension Thursday and Pentecost or Advent Sundays, or the Jewish Passover, for a given year.
• Converting a date between different calendars. For instance, dates in the Gregorian calendar can be converted to dates in the Islamic calendar with the Kuwaiti algorithm.
• Calculating the day of the week.

Calendrical calculation is one of the five major Savant syndrome characteristics.

Rain Man is a 1988 American road comedy-drama film directed by Barry Levinson and written by Barry Morrow and Ronald Bass. It tells the story of abrasive and selfish wheeler-dealer Charlie Babbitt (Tom Cruise), who discovers that his estranged father has died and bequeathed his multimillion-dollar estate to his other son, Raymond (Dustin Hoffman), an autistic savant of whose existence Charlie was unaware. Morrow created the character of Raymond after meeting real-life savant Kim Peek; his characterization was based on both Peek and Bill Sackter, a good friend of Morrow who was the subject of Bill, an earlier film that Morrow wrote.

Rain Man competed at the 39th Berlin International Film Festival, where it won the highest prize: the Golden Bear. The film was released theatrically by MGM/UA Communications Co. under the United Artists label in the United States on December 16, 1988, to critical and commercial success. Praise was given to Levinson's direction, the performances (particularly Cruise and Hoffman), the screenplay, the musical score, the cinematography, and the film's portrayal of autism. The film grossed $354–$429.4 million on a $25 million budget, becoming the highest-grossing film of 1988, and received a leading eight nominations at the 61st Academy Awards, winning four: Best Picture, Best Director, Best Actor (for Hoffman), and Best Original Screenplay.