#偶尔一DDR#
The picture was made presumably at a press presentation or a dress rehearsal for their performance on the "Tag der Nationalen Volksarmee" (Day of the National People's Army), the honorary and memorial day of the NVA, that starting 1957 was held yearly on the 1st of March. The picture shows the (folk) dance group during their performance.

Everybody get up and dance🎵💃