يَوْمَ عَرَفَةَ، وَيَوْمَ النَّحْرِ، وَأَيَّامَ التَّشْرِيقِ.
Translation: The Day of Arafat, the Day of Sacrifice, and the days of Tashriq.
Day of Arafat: 9 Dhu al-Hijjah.
Day of Sacrifice: 10 Dhu al-Hijjah.
Days of Tashriq: 11, 12 and 13 Dhu al-Hijjah.
Thus the total is 1 + 1 + 3 = 5 distinct dates.