Firstly: How to Pelt during the Days of Tashreeq
During the Days of Tashreeq, a pilgrim pelts al-Jamrah al-Sughra, then al-Jamrah al-Wusta, then al-Jamrah al-Kubra, each one with seven pebbles. This is done on the eleventh, twelfth, and thirteenth days. Consensus on this was related by Ibn `Abd al-Barr and Ibn Rushd.
Secondly: The Starting Time for Pelting During the Days of Tashreeq
It is invalid to pelt before the sun passes its zenith during the Days of Tashreeq. This is by agreement of the four schools of jurisprudence.  The clear narration from Abu Hanifah is that pelting is not permissible before the sun passes its zenith except for one who chooses to hasten on the Day of Departure [i.e. the twelfth], in which case it is makruh. His two companions differed – according to them, it is not permissible to pelt except after the sun passes its zenith on all days.
Thirdly: Delaying Pelting
It is valid to delay each day’s pelting to the following day if a need exists. The same holds for delaying all acts of pelting until the thirteenth. The pelting is done in order: one pelts for the first day, then pelts for the second day, etc. This is the position of the Shafi`i and Hanbali schools. This is the chosen position of al-Shinqiti, Ibn Baz, and Ibn `Uthaymin
Fourthly: The Ending Time for Pelting
The time for pelting – whether as a current or make-up performance – ends when the sun sets on the last of the Days of Tashreeq. Consensus on the was related by Ibn `Abd al-Barr, Ibn Rushd, al-Nawawi, al-Qurtubi, and Ibn Taymiyyah.