Ok, your point bothers me. I still want to know the translation of those symbols, letters, or characters before I believe that.
There is nothing odd about the translation. Snopes says -On these days, Muslims wish each other "Eid mubarak," the phrase featured in Islamic calligraphy on the stamp. "Eid mubarak" translates literally as "blessed festival," and can be paraphrased as "May your religious holiday be blessed."
Whats odd is not the meaning of the words but they way they appear.