First day of issue postmark “25 years since the raising of the Ukrainian flag at the Antarctic Station by «Akademik Vernadsky»” / <a href="//commons.wikimedia.org/wiki/Category:Kyiv" title="Category:Kyiv">Kyiv</a> • 19 February 2021.
<a href="//commons.wikimedia.org/wiki/User:Roysma" title="User:Roysma">Roysma</a>
<span class="int-own-work" lang="en">Own work</span>