Dear Stamp Community Forum

I entered the cyrillic letters, letter by letter in a translation program. Result with space between the words: children sunday
result without space between the words: Christmas; but the date 03. -09.10.1994 doesn't necessarily fit....
One of the usual suspects (Yugoslavia, Serbia, Montenegro, Macedonia or Bulgaria) should be the Editor, but who is it? Is it a compulsory tax stamp? A revenue stamp? Or some kind of fundraising stamp?
Thanks for any hint.
Best regards from Switzerland
André