As most people know, Mr. Musk is quite active on twitter, frequently replying to those who ask questions. This time, he must have been caught at the right time as he has stated that the Tesla Model Y will be unveiled on March 15th, although he mentioned this was an arbitrary date. He goes on to state it is just as good a date as any, since it falls within the expected time frame of late 2018 to early 2019.