I can't say EXACTLY Kathy, but it always revolves around the Feb. 6 holiday. My guess is that is will start on Friday night of the 5th and end on Sunday or maybe Monday. Of course, it used to be 4 days of celebration, but that included Gringo Day, which I assume is not happening again this year. Others "here" can will likely be able to confirm these dates...
Daniel's archive on the subject: