"Mubarak - Happy, blessed"

http://www.el-shella.com/kids/MaleArabicNames.htm#M

"In 2001, the US Postal Service issued the Eid Greetings stamp. The Arabic calligraphy, by the noted American calligrapher Mohamed Zakariya, says "Eid Mubarak" "Blessed Eid." This is the first U.S. stamp ever issued to commemorate an Islamic holiday."

http://mec.sas.upenn.edu/marhaba/holidays.htm