The United Arab Emirates Dirham has been used since 1973, when it replaced several currencies such as the Dubai riyal and the Qatar riyal. The dirham was officially pegged to the U.S. dollar at one dollar to 3.6725 dirhams on January 28, 1978. A fils is also the subunit for the Kuwaiti dinars, Iraqi dinarsm, Bahraini dinars and the Yemeni rial.