https://www.learnreligions.com/steps-of-hajj-2004318

“It is the largest annual gathering of human beings on earth, with approximately 3 million people gathering each year for 3 to 5 days between the 8th and 12th of Dhul-Hijjah, the last month of the Muslim calendar.”

In the link, there are descriptions of each step of the pilgrimage accompanied with beautiful imagery.