Umrah is sunnah of the Prophet Mohammad (S.A.W.) and it is also known as ‘Minor Hajj’.
“And complete the Hajj and Umrah for Allah”
Surah Al-Baqarah 2:196
Umrah can be performed anytime during the year except for the five days of Hajj (from 9th to 13th Dhul Hijjah).
“Umrah is an expiration for the sins committed between it and the previous Umrah.”
Sahih Bukhari: 1773
“Performance of Umrah during Ramadan is equal to Hajj (in reward).”
Sahih Muslim: 1255 (a)
“The pilgrims performing Hajj and Umrah are a delegation to Allah. If they call upon Him, He will answer them; and if they ask for His forgiveness, He will forgive them”
Ibn Majah: 2892