question #3 Sahih Muslim 1240b, Book 15, Hadith 218 : What significance does the dawn prayer hold in the context of making religious decisions during Hajj?

The Messenger of Allah (ﷺ) put on Ihigm for Hajj. When four days of Dhu’l-Hijja were over, he led the dawn prayer, and when the prayer was complete, he said: He who wants to change it to Umra may do so.