Question: the second leg of the 2008 Hazfi Cup Final took place in a stadium inaugurated on which day ?
Context: The 2004 Hazfi Cup Final was a two-legged football tie in order to determine the 2003–04 Hazfi Cup champion of Iranian football clubs.  Sepahan faced Esteghlal in this final game. .  The first leg took place on July 8, 2004 at Naghsh Jahan Stadium in Esfahan and the second leg took place on July 15, 2004 at Azadi Stadium, Tehran. The 2012 Hazfi Cup Final was the 25th edition of the Hazfi Cup since 1975.  The match between Esteghlal and Shahin Bushehr took place on 15 March 2012 at the Hafezieh Stadium.  Esteghlal beat Shahin Bushehr 4-1 on penalties and qualified for the 2013 AFC Champions League. The 2005 Hazfi Cup Final was a two-legged football tie in order to determine the 2004–05 Hazfi Cup champion of Iranian football clubs.  Aboomoslem faced Saba in this final game. .  The first leg took place on July 12, 2005 at Saba City Stadium in Tehran and the second leg took place on July 15, 2005 at Samen Al-Aeme Stadium, Mashhad. The 2007 Hazfi Cup Final was a two-legged football tie in order to determine the 2006–07 Hazfi Cup champion of Iranian football clubs.  Saba Battery faced Sepahan in this final game.  The first leg took place on Jun 09, 2007 at 17:00 local time () at Derakhshan Stadium in Robat Karim and the second leg took place on Jun 16, 2007 at 16:30 local time () at Naghsh Jahan Stadium, Esfahan. The 2009 Hazfi Cup Final was a two-legged football tie in order to determine the 2008–09 Hazfi Cup champion of Iranian football clubs.  Rah Ahan faced Zob Ahan in this final game.  The first leg took place on May 18, 2009 at 17:00 local time () at Rah Ahan Stadium in Ekbatan and the second leg took place on May 22, 2009 at 17:00 local time () at Foolad Shahr Stadium, Fooladshahr. The 2011 Hazfi Cup Final was a two-legged football tie in order to determine the 2010–11 Hazfi Cup champion of Iranian football clubs.  Persepolis faced Malavan in this final game.  The first leg took place on June 07, 2011 at 19:45 IRDT () at Azadi Stadium in Tehran and the second leg took place on June 10, 2011 at 17:00 local time () at Takhti Stadium, Bandar Anzali. The Azadi Stadium (Persian: ورزشگاه آزادی‎ ‎ "varzeshgāh-e āzādi") formerly known as Aryamehr Stadium (Persian: ورزشگاه آریامهر‎ ‎ "varzeshgāh-e āryāmehr") is an all-seater football stadium in Tehran, Iran.  The stadium was designed by SOM and inaugurated on 18 October 1971; it is self-owned by Esteghlal F.C. and Persepolis F.C..  It is also the home stadium of the Iran national football team.  It has a current capacity of 78,116 spectators, though it has been able to hold more than that during special matches.  The stadium is part of the much larger Azadi Sport Complex, and is surrounded by a rowing river, football training pitches, a weightlifting complex, swimming facilities and indoor volleyball and futsal courts, among many other amenities. The 2008 Hazfi Cup Final was a two-legged football tie in order to determine the 2007–08 Hazfi Cup champion of Iranian football clubs.  Esteghlal Tehran faced Pegah Gilan in this final game.  The first leg took place on Jun 09, 2008 at 17:30 local time () at Sardar Jangal Stadium in Rasht and the second leg took place on Jun 16, 2008 at 17:00 local time () at Azadi Stadium, Tehran. The 2010 Hazfi Cup Final was a two-legged football tie in order to determine the 2009–10 Hazfi Cup champion of Iranian football clubs.  Persepolis faced Gostaresh Foolad in this final game.  The first leg took place on May 13, 2010 at 16:00 IRDT () at Yadegar-e Emam Stadium in Tabriz and the second leg took place on May 24, 2010 at 16:00 local time () at Azadi Stadium, Tehran. The 2006 Hazfi Cup Final was a two-legged football tie in order to determine the 2005–06 Hazfi Cup champion of Iranian football clubs.  Persepolis faced Sepahan in this final game.  The first leg took place on September 13, 2006 at 17:40 local time () at Azadi Stadium in Tehran and the second leg took place on September 22, 2006 at 15:00 local time () at Naghsh Jahan Stadium, Esfahan.
Answer: 18 October 1971