What are the valid days for the হজ্জ sacrifice (hady)?

The time for the হজ্জ sacrifice (hady) begins after the Eid সালাত on the 10th of Dhul Hijjah and extends through sunset on the 13th of Dhul Hijjah (the last day of Tashreeq). This is the view of the majority of scholars. নবী করীম (সাল্লাল্লাহু আলাইহি ওয়া সাল্লাম) said: 'All the days of Tashreeq are days of slaughter' (narrated by Ahmad, graded sahih by al-Albani in Irwa' al-Ghalil 1141). Sheikh Ibn Baz stated: 'The time for sacrifice is four days: the day of Eid and the three days of Tashreeq' (Fatawa Ibn Baz, vol. 16). Slaughtering at night is permissible according to the strongest opinion, though daytime is preferred. The Permanent Committee ruled that the sacrifice must be done within these days and cannot be delayed beyond them without a valid excuse.