The flag of Turkey has an overall red background with a white crescent moon and a five-pointed star in its centre. The flag is called Ay Yıldız (literally, moon star) or Alsancak (red banner) in Turkish. The shape and flag ratio of the Turkish flag is described as 2:3 (length 1½ times the height).
Meaning of the Turkish Flag
The Turkish flag uses the same symbols of the late flag of the Ottoman Empire. The crescent and star are ancient symbols of Islam and are considered to be signs of good luck. The most accepted legend of the flag in Turkey is that in the year 1071, after the Battle of Manzikert and the defeat of the Byzantine army, the Seljuk Khan, Alp Arslan was roaming the battlefield where he saw the reflection of the crescent moon and the star on a pool of blood of Turkish warriors. After he saw this image, he decided that this would be the flag representing the Turks.