FACTBOX: Calendar of U.S. presidential primaries

(Reuters) - Iowa will on Thursday stage the first of the state-by-state contests to choose Republican and Democratic nominees for the November 2008 presidential election.

Here is a calendar of the 2008 U.S. presidential nominating state primaries and caucuses. In some states, the contests are nonbinding and separate caucuses or conventions are scheduled to select delegates to the national conventions.

JANUARY 2008

* January 3: Iowa

* January 5: Wyoming (Republican)

* January 8: New Hampshire

* January 15: Michigan

* January 19: Nevada, South Carolina (Republican)

* January 26: South Carolina (Democratic)