Hijira kalanda
Hijira kalanda ;kalanda wata abuce da musulmai suke amfani da'ita a fadin duniya domin kididdige kwanaki da watanni dan sanin ranar da za'ayi Azumin Watan Ramadan, da sauran bukukuwan musulunci na shekara kaman karaman sallah da babban sallah.

Asali 
Hijira asali kalman Larabci ce aka arota zuwa yaran Hausa (ma'anar kalmar shine kaura daga wani guri zuwa wani guri, amman galibi domin samun salama.) wanda kalmar data dace da ita a hausa itace Kaura, amman ma'anan kalmar a addinin Musulunci na nufin:- "Hijiran da Manzon Allah yayi tare da Abubakar Siddiq daga Makka zuwa Madinah (Yasrib) a shekarar  622)  bayan kafiran makka sun tsara su kashe shi a watan Janairu shekarar 622, sai Allah ya umurci Annabi da yayi Hijira daga Makka zuwa Madinah, wanda a wancan lokacin ana kiran garin da Yasriba, zuwan Annabi garin keda da wuya, sai aka sama garin suna da Madina ma'ana Birni 

Daga wannan lokacin ne aka fara kidayar watannin musulunci.

Watanni 
Akwai watanni guda hudu masu alfarma a cikin wataanni goma sha-biyu na musulunci sune;

Rajab  watan bakwai(7), and the three consecutive months of
 Dhū al-Qa‘dah (11), 
 Dhu al-Ḥijjah (12) and 
Muharram (1).

Manazarta