According to the U.S. Constitution, on what date does a presidential term end and the next one begin?

CNN: Newsquiz: Week of January 21

All the constitution prescribes for an inauguration is a date, a time and an oath before Congress.

ECONOMIST: Beat the drum slowly

Unlike the Gunpowder Plot, Mr Blair's attempt to rearrange the British constitution cannot be given a single neat date.

ECONOMIST: Undoing Britain?

Mr Obama took the oath in the Blue Room to meet the 20 January date set out in the US Constitution.

BBC: Inauguration Day: Obama sworn in for second term

Maduro said that reading of the constitution is false, and that the swearing-in date is flexible.

CNN: STORY HIGHLIGHTS

Court of Appeals, holding that Obamacare and the mandates included in the law do not violate the United States Constitution, has handed the pro-Obamacare forces their most important victory to date.

FORBES: D.C. Court Of Appeals Upholds Constitutionality Of Obamacare, Stuns Conservatives

No date has been set for the elections - the first under a new constitution which is supposed to expand civil liberties in Zimbabwe.

BBC: Robert Mugabe 'donkey' jibe - Solomon Madzore detained