وَتَكْبِيرُ التَّشْرِيقِ أَوَّلُهُ عَقِبَ صَلَاةِ الْفَجْرِ مِنْ يَوْمِ عَرَفَةَ، وَآخِرُهُ عَقِبَ صَلَاةِ الْعَصْرِ مِنْ يَوْمِ النَّحْرِ عِنْدَ أَبِي حَنِيفَةَ، وَقَالَ أَبُو يُوسُفَ وَمُحَمَّدٌ: إِلَى صَلَاةِ الْعَصْرِ مِنْ آخِرِ أَيَّامِ التَّشْرِيقِ.
Translation: The takbirs begin after Fajr on the Day of ‘Arafah. Abu Hanifah ends them after Asr on the Day of Sacrifice; Abu Yusuf and Muhammad extend them through Asr on the last Day of Tashriq.
Arafah is 9 Dhu al-Hijjah, the Day of Sacrifice is the 10th, and the last Tashriq day is the 13th.
All three agree on the starting point; Abu Hanifah ends after Asr on the 10th, while his students extend to Asr on the 13th.