Since it was revealed by unnamed sources that Samsung was planning a 14th March launch date for the Samsung Galaxy S4, the company has recently made the date official in a tweet.
Samsung Mobile tweeted that the launch event for the new flagship device – given away by the use of the number 4 – will officially take place on 14th March.
— Samsung Mobile (@SamsungMobile) February 25, 2013
As for the location, Samsung Mobile chief JK Shin also commented at the Mobile World Congress that the Galaxy S4 will be unveiled at a Samsung Unpacked event in New York City.
Source: The Verge