People carrying Ukrainian flags form a human chain across a bridge on the Dnipro River to symbolize national unity on Unity Day in Kiev, Ukraine. /Reuters Photo

A woman with her face painted in the colors of the Ukrainian flag takes part in the celebration. The blue in the flag represents the pristine sky, streams and icy mountains of Ukraine while the yellow represents the agricultural wealth of the golden wheat fields. /Reuters Photo

The unification of Ukraine was sealed with the Unification Act signed by the Ukrainian People's Republic and the West Ukrainian People's Republic on January 22, 1919. Since then, the unification is celebrated each year on January 22. /Reuters Photo