The "White Days" (Ayyam al-Beedh) refer to the 13th, 14th, and 15th days of every month in the Islamic calendar, which are considered special days for fasting, prayer, and charity.
These days are considered "white" because the moon is full and bright during this time.
The silver encasement of Hajr e Aswad was made for the first time by Abdullah bin Zubair (RA).
Abdullah bin Zubair (RA) was the first person to put a silver container around the Hajr e Aswad to protect it from any future attacks, as it had been damaged by catapults during the Umayyad siege of Mecca in 683 CE.
The Takbeer-e-Tashreeq will be recited after 23 Salaah.
The Takbeer-e-Tashreeq is a declaration of faith recited by Muslims during the days of Hajj and Eid Al-Adha.
It is recited after every Fardh Salah, starting on the 9th of Dhul Hijjah, the day of Arafah, and continues until the Asr prayer on the 13th of Dhul Hijjah.