The most important day is the 9th day or the Day of Arafaat. Every Muslim must fast it.
Hajj is important in Islam because it is one of the Five Pillars, mandatory for all able-bodied Muslims who can afford it. It is an act of worship, a spiritual journey, and a symbol of unity among Muslims from around the world. Hajj commemorates the rituals performed by Prophet Ibrahim and his family and reinforces values of devotion, sacrifice, and equality.
To remember the days they were born which are the most important one for them.
ONE
There are two Eid celebrations. One is Eid after the month of Fasting - Ramadan, and another Eid during tenth day of Haj Pilgrimage. In the West Muslims celebrate for one day only, but in the Islamic countries they celebrate it for about 3 to 4 days.
"haj" is a nice short one.
One-in 10th Hijjra.
no one born in kaaba thats a holy place where muslims do prayers and haj
I know one of them is Gettysburg.
meating one directon
i think that one of greeces most important event was the olympics
one of the sumerian´s most important developments was THE WHEEL.
Water is one of the most important compounds neceesary for life.