BBC America has announced that their broadcasts of the new series of Doctor Who will start on April 17th. The date has been reported in the Hollywood trade paper Variety, and has been confirmed on BBC America's website and Facebook page.
The start date for UK broadcast has not yet been officially confirmed. There are reports that a trailer has aired with the date of April 3rd, but this may have been broadcast in error. The BBC's official position is that the series will debut "at Easter".