Ashurra, is celebrated by Sunni Muslims (Qatar is mostly Sunni, although there are a number of Shiite expats living and working here) as the day Noah's ark found ground, the day Abraham was born and the day the Kabaah*, the holiest place in Islam, was built.
Qatar's currency (QAR or QR) is the riyal. The riyal is found in denominations of 1, 10, 50, 100 and 500 notes.