Muslims observe Ramadan. It is a month of fasting which moves each year as it is calculated according to a lunar calendar.
President Barack Obama has started a new tradition at the White House in honor of Ramadan. According to the official White House site: http://www.whitehouse.gov/blog/2010/08/14/president-obama-celebrates-ramadan-white-house-iftar-dinner
Muslims observe the holy month of Ramadan, where one who is of age fasts from dawn (fajr prayer) to sunset (maghrib prayer) and does many good deeds, like reading Qur'an, and praying Tarawih prayer at the Masjid at night.
President Barack Hussein Obama was the first President of the United States to set a new tradition at the White House in honor of Ramadan. See: http://www.nbcchicago.com/news/politics/Obama-Calls-Islam-Great-Religion-at-Ramadan-Feast-56677382.html
He celebrated for the second year in a row in 2010 according to the White House. See: http://www.whitehouse.gov/blog/2010/08/14/president-obama-celebrates-ramadan-white-house-iftar-dinner
Muslims
yes, all the countries in the world that has anyone Muslim in it celebrates Ramadan
Islam
Ramadan is celebrated by Muslims.
it's not about the culture anyone from any culture who is Islam celebrate Ramadan.
Jewish culture
The Irish culture.
Jewish
Japan
Are you asking who celebrates it or which culture,or people, that celebrate it? Anyway the answer is: No I don't
Ramadan is the month of fasting. It is also feast as Muslims are rewarded by God mercy, forgiveness, and by its end they saved from the Hell after day of Judgment. The first day after Ramadan, Muslims celebrates Eid-al-Fitr
Eid ul-Fitr or Id-ul-Fitr celebrates the end of Ramadan