Bosnians actually do not celebrate Christmas because most of them are Muslims
They celebrate mostly 'Kurban Bajram' ( though its a muslim holiday many people celebrate it ) , 'Ramazan Bajram'( Also a Muslim holiday ) and Christmas.
From Bosnia
most bosnians are of the Muslim religion and Muslims have their own holidays so they dont celebrate Christmas. December 25th 2011 UPDATE: Actually to correct the above answer since its partially untrue. Bosnians can celebrate Christmas because some ARE Christians. Most are Orthodox which just celebrate Christmas on or near January 7 in the Gregorian calendar, which is celebrated around the same time on the Julian calendar (what Canadians and American's use). Very minimal are Muslim but as any religion it could pick up at any given time, and yes if they are Muslim they do not celebrate Christmas. Most are Orthodox though because they are Slavic like the Greeks, Russians, Ukrainians, etc. It all depends also on how devout they are as well, some just celebrate on both of just December 25th because its become "tradition" in the Western World.
bosnian is a nationality
Bosnians commonly speak Bosnian as their first language, which is mutually intelligible with Croatian and Serbian. Many Bosnians also speak English or German as a second language, especially among the younger population.
4 - 5 million bosnians, around 2 million of them are bosniaks(the original population)
Islam and Christianity
12,000 or so
they waz sad.
they eat klukusa, sarme, janje.
There are 28 countries in the world Bosnians can go without visas. Go to http://en.wikipedia.org/wiki/Bosnia_and_Herzegovina_passport for the list of those countries.