Ramadan is the month of the year in which a Muslim has to fast .
and hajj means performing pilgrimage to the city of makkah and it's obligatory upon every financially able Muslim , it has to be done only once in a lifetime , u can perform it again but it's not obligatory anymore.
To complete Hajj, you have to do it for 40 days
Muslims celebrate Ramadan and Hajj
Fasting Ramadan (Sawm) and performing pilgrimage (Hajj) are the fourth and fifth pillars of the five Islam pillars. Refer to question below.
Hajj is performed only during 8th to 13th of the month of Zil Hajja. During other days it is called Umra.
The main two religious events in Islam are Ramadan and Hajj.
They should fast during the month of Ramadan, and the hajj, or pilgrimage to Mecca.
National Day: September 23 Ramadan Holidays : 4 days in the month of Ramadan EID Holidays: 4 days For HAJJ to Mecca
Anytime although preferably at night and more preferably in Ramadan and during hajj.
It has been ordained in Islam. It is two moths and NINE days after Ramazan, the main ritual of Hajj is on 9th Zil Hijja.
It is done by heart that means you intend to fast the days of Ramadan. Getting your late meal (Souhour in Arabic) is also by itself niyat to fasting.
Main four rituals are:praying (Salat)Alms giving (Zakat)Fasting Ramadan (Sawm)Doing Pilgrimage (Hajj)Refer to related question below for more details.
There are many but most famous todays is of eids,hajj 27 ramadan etc but many has been given