The Apertura 2007 Tournament begins August 3rd and ends December 9th. Please note that each tournament leg may be played over different days. As an example, the 1st set of matches starts on August 3rd, but features games on August 4th and 5th. This is done so as to maximize the TV ratings & earnings for the Argentine Soccer Association and the Clubs... its a little like in the USA with Monday night Football.
For details on the schedule please see (sorry, Spanish only) - scroll down to seach each leg of the tournament and the respective game dates.
http://www.26noticias.com.ar/se-ofic...007-43977.html