The flag of Turkmenistan (Turkmen: Türkmenistanyň baýdagy) features a white crescent (symbol of Islam) and five stars representing the five regions of the country and the Five Pillars of Islam. Placed upon a green field is a symbolic representation of the country's famous carpet industry. It was introduced as the flag of Turkmenistan on 27 September 1992 to replace the Soviet-era flag which consisted of a red background with two light blue bars in the middle. The modified version with a 2:3 ratio was adopted on 23 January 2001. State Flag and Constitution Day is celebrated on 18 May.