According to the Decree of the President of Ukraine № 17/2016 (as of January 22, 2016), 2017 was proclaimed the Year of the Ukrainian revolution of 1917–1921.

In turn, during the course of the year the Ukrainian Institute of National Memory will speak about the events of the Ukrainian revolution. Among their first projects is a calendar called “The Ukrainian Revolution of 1917–1921. Military units”, which includes original photos and photo-reconstructions of uniforms of Ukrainian military units in those days. On the reverse side of each page is a detailed commentary about the illustrated military formations.

You can read more information on the site of the institute.