Flag of Ukraine

Ukraine

Use	National flag, civil and state ensign
Proportion	2:3
Adopted	22 March 1918; 106 years ago (1918-03-22) (officially adopted) 24 August 1991; 33 years ago (1991-08-24) (de facto restored) 28 January 1992; 32 years ago (1992-01-28) (officially restored, current design)
Design	A horizontal bicolour of blue and yellow
Sky-blue version
The sky-blue version that was used from 1917 to 1921 and later was reintroduced in 1992; it is still in widespread use next to the current darker version which was introduced in 2006.[1][2][3][4][5][6]
Naval ensign
Use	Naval ensign
Proportion	2:3
Adopted	20 June 2006
Design	White with a blue Saint George's cross that extends to the edges of the flag, with the national bicolour in the canton.

The national flag of Ukraine (Ukrainian: Державний прапор України, romanized: Derzhavnyi prapor Ukrainy, pronounced [derˈʒau̯nei̯ ˈprapɔr ʊkrɐˈjine]) consists of equally sized horizontal bands of blue and yellow.

The blue and yellow bicolor flag was first seen during the 1848 Spring of Nations in Lemberg (Lviv), the capital of the Kingdom of Galicia and Lodomeria within the Austrian Empire. It was later adopted as a state flag by the short-lived Ukrainian People's Republic, the West Ukrainian People's Republic, and the Ukrainian State following the Russian Revolution.

In March 1939, it was also adopted by Carpatho-Ukraine. However, when Ukraine was part of the Soviet Union, the use of the bicolor flag was banned, and it was replaced by the flag of the Ukrainian Soviet Socialist Republic. This flag featured a red background, with an azure bottom and a golden hammer and sickle, along with a golden-bordered red star on top. When the Soviet Union dissolved in 1991, the bicolor flag gradually returned to use before being officially adopted again on 28 January 1992 by the Ukrainian parliament.

Ukraine has celebrated the Day of the National Flag on 23 August since 2004.