The 60th anniversary of Labour Day, celebrated on 1 May (1 Maj).
marching under a flag
(poster art from Michał Bylina)
Labour Day (celebrated 1 May) exists since 1890.
60 lat 1 Maja = 60 years 1 May.
Find other Polish stamps commemorating Labour Day
Poster art by Michał Bylina (www.theartofposter.com)