1 – Implemented Hijri calendar
2 – Introduced Jail System.
4 – He order to maintain light in all Mosques during night times.
5 – Introduced the Police system for the first time.
6 – Lay down the foundation of a complete court system where even he was answerable.
8 – He introduced the Canal System for agriculture and irrigation system.
9 – He first time made the Army FOB’s (Forward operating bases) and laid the foundation of a military departments and a complete organization system.
11 – Made the rich and government officials to declare their assets.
12 – Punished unjust judges.
13 – First time in history started accountability of upper class.
15 – During his tenure the Taraweeh Prayer was started regularly.
16 – Adopted the sentence (Prayer is Better than Sleep) in Fajar Prayer.
17 – Built resting places on many places on famous trading routes.
19 – He was the only ruler ever to admit that even if a dog died of hunger on the banks on river Tigris during his rule, he would have to bear the punishment for this.
21 – His sentence “Mothers give birth to free children, since when have you enslaved them” is still considered the charter of human rights.
His saying is that “the leader of the nation is actually its servant.”
Caliph Umar never had two dishes on his table.
Caliph Umar used to go to sleep with a brick and even his own elbow as a pillow.
Caliph Umar used to sleep on bare ground at night. His shirt had 14 patches, among them one of red leather.
Caliph Umar used to wear thick coarse cloth and hated soft one.
If the wealth of that person increased during his tenure, he would be held accountable.
Umar was the first Caliph of Islam who was given the title “Ameer‐ul‐Momineen”
His justice gave rise to the term “Adl‐e‐Farooqui” (the justice of Farooq).
Muslims would lean towards Khalifa Umar as the westerners or other orientalists might lean towards Alexander, but the fact is that Umar conquered much more by serving people than Alexander did when people served him.