Prithviraj’s big summer release Calendar, where he is paired with Navya Nair is already set to release on May 14.But due to some issues with UFO, Quebe system the film is postponded to May 21. The film directed by actor Mahesh, has Zarina Wahab making a comeback to Malayalam films after 27 years. In Calendar, Zarina is Thangam George, a widowed professor whose life revolves around her only daughter Kochu Rani played by Navya Nair. Prithvi plays the guy who creates the first rift between them. Mukesh, Jagadheesh, Jagathy, Vijayaraghavan, Mallika Sukumaran and Suraj Venjaaramoodu are also in the cast. Prithviraj needs a big hit in Malayalam to regain his position as the guy who can challenge M & M. But his last two releases Lollipop and Nammal Thammil were total washout and setback for him. Calendar, carries good pre-release reports and is said to be a humorous, emotional and romantic movie which may strike a chord with the family audiences.