Hajj refers to a list of prescribed routines you will have to conduct on the holy land of Mecca. The Hajj pilgrimage is held within the thirty day period of Zulhijjah yearly. This is also regarded as an annual collecting of globe Muslims. On this section, you can learn more https://islamarticle.com/blogs/12-rabi-ul-awwal-eid-milad-un-nabi/