28 October Nominations for the Presidential election close at midday, with a record seven candidates in the running to succeed President Mary McAleese.
The election will be held on Thursday 27 October.
All seven candidates take in the first Presidential debate of the campaign on RTÉ's News At One.
They set out their arguments as to why they should be elected Ireland's ninth President.
29 September Martin McGuinness is challenged by Arlene Foster to reveal what she claims he knows about the Enniskillen bomb atrocity.
Foster, Northern Ireland's Trade and Industry Minister, says there has been speculation for decades that it was the IRA from Derry which was involved in the 1987 bombing which killed 11 people as they gathered at the town's cenotaph.
McGuinness has admitted being in the IRA in Derry but insists he left the organisation in 1974.
30 September The candidates take part in the first televised debate of the Presidential campaign on The Late Late Show.
David Norris had already appeared on the show two weeks earlier, so the other six candidates get a chance in turn to set out their stalls and say why they should be President.
When Norris joins the debate, he says it is time to move on from the controversy surrounding letters he wrote seeking clemency for his former partner, Ezra Nawi.
3 October McGuinness accuses Fine Gael of using "black propaganda" and "dirty tricks" after three senior party figures launch strongly-worded attacks on his candidacy.
Minister for Environment Phil Hogan tells a Sunday newspaper that multinational companies would be appalled if McGuinness was President, and indicated his IRA past would drive away corporate investment from Ireland.
McGuinness says the interventions are bizarre and had no validity in the campaign.
Meanwhile, Mary Davis says any fees she earned for her service on semi-State and commercial boards were transparent and in the public domain.
4 October The founding Secretary of the Irish Association of Suicidology Dr John Connolly says that a remark made by Gay Mitchell that he would jump off O'Connell Bridge if he was asked any more to smile was "unfortunate".
5 October A televised debate on TV3 sees the candidates clash on their records, and their ideas for the office.
Mitchell again attacks McGuinness over his membership of the IRA, but it is host Vincent Browne who really strikes home, producing a number of books claiming McGuinness was a member long after 1974.
McGuinness says people are not interested in the issue and will judge him on his overall record.
6 October The latest Presidential opinion poll shows Michael D Higgins leading in the race for the Áras, with Séan Gallagher and McGuinness also polling strongly.
Higgins leads the poll on 23%, five points higher than he was in the last Irish Times poll in July. Gallagher is on 20%, seven points higher than in July, while McGuinness is on 19%. Norris has seen his support drop by 14 points to 11%.
7 October A second poll in 24 hours confirms some dramatic shifts in the standing of the various candidates, with Gallagher emerging as a serious challenger.
The opinion poll, conducted by Red C for Paddy Power, shows Higgins at 25%, up 7%. Gallagher stands at 21%, up 10%.
8 October Dana Rosemary Scallon denies claims made by her sister in a court case three years ago that her husband and her brother were involved in a decision not to tell the Irish public that Scallon had become a US citizen prior to the 1997 Presidential election campaign.
Scallon says her US citizenship, which involved her taking an oath renouncing allegiance to Ireland, was not an issue then or now and she had no reason to hide it.
9 October Gallagher moves to clarify information about his involvement with Fianna Fáil, after he confirms he only formally resigned from the party's National Executive in January of this year.
Scallon says newspaper revelations about a dispute within her family over money, is a private and personal matter that had been worked through.
10 October Minister for Justice Alan Shatter says Mitchell has the "fullest support" of himself, Cabinet colleagues and the Fine Gael party.
11 October Mitchell says he would "be disposed to the idea" of joining the Commonwealth if it led to a united Ireland.
He makes the comment during a Today FM presidential debate.
The idea of joining the Commonwealth does not appeal to Scallon or to McGuinness, who says he would not accept a situation where "the Queen of England would have precedent over the Irish President".
12 October Scallon reveals that further allegations have been made against her family. Ms Scallon announces the news during a debate on RTÉ's Prime Time.
There are some heated exchanges in the third of five Presidential debates. McGuinness robustly denies that he knows who killed Private Paddy Kelly, whose son confronted him earlier in the week.
Norris says accusations against him of welfare fraud are "a lie". Davis says she had only served on three State boards, not the 25 some people claimed. And Gallagher refuses to say if he believes Fianna Fáil had let people down.
13 October McGuinness claims that the Prime Time debate was unfair and amounted to "trial by television". He also denies that he had a row with the programme's presenter, Miriam O'Callaghan.
For the first time in the campaign, Gallagher criticises Fianna Fáil's performance in government in the lead-up to the collapse of the economy.
Gallagher says he abhorred what he described as the mismanagement of the country and its finances in the run-up to the economic collapse.
Scallon does not campaign after her dramatic claim in the Prime Time debate.
14 October Scallon rejects allegations made against a member of her family and confirms that she intends to stay in the Presidential campaign.
Norris asks Trinity College Dublin to provide details of the money paid to him while he was ill.
15 October Scallon says it is deeply upsetting that more revelations about a dispute within her family were being leaked to newspapers and the internet.
Ms Scallon describes allegations of a sexual nature against a member of her family as "vile" and "malicious" and she says she is standing over her statement.
Gallagher places a €1,000 charity bet that he will win the Presidency.
16 October Mitchell rejects the findings of the latest opinion poll. The Red C poll in the Sunday Business Post shows Mitchell dropped two points to 8%.
Gallagher sees his support increase by 18 points since the last Red C poll nine days ago and is now on 39%. Higgins is on 27%. All the other candidates have lost support.
17 October Davis says she accepts "collective responsibility" for decisions made in relation to mortgage lending while she was on the board of the ICS Building Society.
Davis says if she had known then what she knows now, there would not have been 100% mortgages. She says she has acted with integrity at all times.
Gallagher dismisses suggestions that he and Higgins should have a one-to-one debate.
18 October The candidates participate in an hour-long bilingual debate on TG4.
Gallagher, Scallon, Norris and McGuinness say they would like to become fluent in the Irish language.
The debate sees a number of attacks on Gallagher, who has been identified in opinion polls as the leading candidate. When Gallagher says he supports changing the national anthem to make it less militaristic, McGuinness refers to him as a "revisionist".
Most of the exchanges are in English as only Higgins is fluent in Irish.
19 October Scallon notifies gardaí in Carrick-On-Shannon about possible tampering with the rear wheel of her campaign car. The tyre blew the night before as she and three others were returning to Dublin from Co Leitrim.
It subsequently emerges that the more than 12 abrasions and holes were probably caused by driving on an under-inflated tyre.
Higgins confirms that he would only serve one term if elected.
20 October McGuinness responds to a statement by the widow and family of Detective Jerry McCabe questioning his suitability for the office of President.
McGuinness rejects the claim by the McCabe family that he met one of the suspects for Detective McCabe's killing while that person was wanted by gardaí.
Higgins withdraws remarks, made in a press release, that Norris was being "economical with the truth" when it came to whether he had voted against the banking guarantee.
Gallagher responds to reports about his financial and political affairs in the past three years.
One report relates to a large loan paid to him by one of his companies two years ago, while another concerns his fundraising for Fianna Fáil. The loan of almost €83,000 was paid to Gallagher by one of his companies - Beach House Training and Consulting Limited - in 2009.
It breached company law as it exceeded the cap for such loans set at 10% of a company's assets.
Gallagher says this had been an honest mistake and says it related to a cheque that had been lodged to the wrong account.
21 October A tape emerges of a controversial conversation in 2002 between Presidential candidate Norris and journalist Helen Lucy Burke.
The tape, which is broadcast on RTÉ's Liveline programme, confirms that Norris made a number of comments about the age of consent attributed to him in an article written by Burke.
Norris reacts to the playing of the interview by saying there is nothing new in the tape.
Higgins, McGuinness and Mitchell rule out any transfer pact with other Presidential candidates.
23 October Three opinion polls show that Gallagher retains a strong lead over Higgins. All three polls have him at around the 40%, with Higgins trailing by between 12 and 15 points.
All seven candidates take part in a Saturday with Charlie Bird radio debate at Dublin City University.
Among the issues discussed are the health system, ageism, support for small business and how each candidate would bring value for money to the office.
24 October Gallagher's campaign is rocked by the outcome of a final televised debate on The Frontline.
McGuinness challenges his rival about a cheque he received in 2008. Gallagher initially says he had no recollection of receiving a cheque for €5,000. He then claims the man in question (Hugh Morgan) was a fuel smuggler with links to Gerry Adams, but seems to concede that there may have been an envelope handed over.
When the issue of businessman Denis O'Brien's suitability for the Council of State was raised, Mitchell clashes angrily with moderator Pat Kenny.
25 October The fall-out from The Frontline debate continues as Morgan releases a statement saying he handed a cheque for €5,000 to Gallagher for Fianna Fáil in June 2008.
Gallagher says he is absolutely sure that he did not receive a cheque from Mr Morgan.
Meanwhile, a daughter of Jean McConville criticises the participation of Martin McGuinness in the Presidential election
Jean McConville was the mother of ten who was abducted by the IRA in Belfast in 1972 and shot dead.
