Question: When was Una Foden confirmed as a judge for the 4th series of "The Voice of Ireland"?

Context articles: The Voice of Ireland
Patrick James (singer)
List of Eve (2015 TV series) episodes
The X Factor (Greece series 5)
LeRoy F. Millette Jr.
4th Impact
The X Factor (UK series 11)
Una Healy
Cearbhall Ó Dálaigh
Waterloo Road (TV series)

The Voice of Ireland was the Irish edition of the international TV franchise "The Voice", a reality singing competition created by media tycoon John de Mol.
 The first series began airing from 8 January 2012 on RTÉ One.
 The coaches originally were Bressie, Sharon Corr, Kian Egan and Brian Kennedy.
 Kennedy left after the first series and was replaced by Jamelia.
 After the second series, Corr quit the show owing to other commitments and was replaced by Dolores O'Riordan.
 Following series 3, Dolores and Jamelia quit.
 The coaches for series 4 were Bressie, Una Foden, Kian Egan and Rachel Stevens.
 The show was hosted by Kathryn Thomas and co-hosted by Eoghan McDermott, who also presented backstage show "The Voice After Party" in Series 3.
Patrick James Donoghue is an Irish musician and recording artist with Universal Music.
 Originally from Dublin, Donoghue was a checkout worker at Dunnes Stores who rose to fame with winning series 4 of the talent show "The Voice of Ireland", becoming the fourth consecutive male to win the title, as well as the first ever champion under new coach Una Foden of The Saturdays.
 Months after his success, he revealed to the public that he had changed his stage name to Patrick James, as he felt it suited him more as an artist.
Even though the 3rd Series ended on a cliffhanger, head writer and co-creator Emma Reeves on Twitter revealed there are no plans for a 4th Series to be released in the next few years.
 They have made plans for future episodes but at the moment it's not happening due to money issues in the BBC.
The X Factor is a Greek and Cypriot television music competition to find new singing talent.
 The fifth series will begin airing on Skai TV and Sigma TV on April 27, 2017.
 Sakis Rouvas returned to present the main show on Skai TV for the fifth time and with Evagelia Aravani returned on Auditions Shows, Bootcamp, Chair Challenge and in Backstage at the Live Shows.
 Tamta was the only judge from the 4th series to return.
 Giorgos Mazonakis, Giorgos Papadopoulos and Babis Stokas are the new judges in the series, replacing George Theofanous, Peggy Zina and Thodoris Marantinis.
 For the first time in The X Factor Greece the winner will not be from the "Boys".
LeRoy Francis Millette Jr. (born July 30, 1949) is a senior justice of the Supreme Court of Virginia.
 Justice Millette was appointed to the Court by Virginia Governor Tim Kaine to fill a vacancy created by the retirement of Justice G. Steven Agee, who had been appointed to the federal 4th Circuit Court of Appeals.
 On February 11, 2009, Justice Millette was confirmed for a full 12-year term by the Virginia General Assembly beginning retroactive to February 1, 2009.
 He entered senior service in 2015.
 Millette previously served for less than one year on the Court of Appeals of Virginia, also having been appointed by Gov. Kaine and then being subsequently confirmed by the General Assembly.
 Prior to that, he served as a judge of the Circuit Court of Prince William County, Virginia, in which position he presided over the capital murder trial of John Allen Muhammad, the infamous Beltway Sniper.
 Millette confirmed the jury's sentence of death of Muhammad.
 Millette also was involved in some of the proceedings of the Lorena Bobbitt trial in 1993.
 Prior to serving on the Circuit Court, Judge Millette was a General District Court Judge, making him one of only three Virginia jurists, along with Justice Lawrence L. Koontz Jr. and Justice Barbara Milano Keenan, to have served at all four levels of courts in Virginia.
 He received his undergraduate degree from the College of William and Mary and his law degree from the Marshall–Wythe School of Law at William and Mary.
 Justice Millette is married to M. Elizabeth O’Brien Millette and they have two children, Lauren Elizabeth Millette and LeRoy F. Millette III.
4th Impact (formerly known as The Cercado Sisters, The Cercados, The Gollayan Sisters, MICA, and 4th Power) is a Filipino girl group composed of sisters Almira, Irene, Mylene, and Celina Cercado.
 The group rose to popularity after competing in the 12th series of "X Factor UK", where they finished in fifth place.
 They are also known for having participated in several Philippine and international talent competitions, including the "World Championships of Performing Arts", where they won in 2006 and 2013, and the South Korean talent search "Superstar K6" in 2014, where they reached eighth place.
 The sisters were originally from Santiago City, Isabela, but are now based in Metro Manila, Philippines.
The X Factor is a British television music competition to find new singing talent.
 The eleventh series began airing on ITV on 30 August 2014 and finished on 14 December 2014.
 Dermot O'Leary presented his eighth series of the main show on ITV and Sarah-Jane Crawford presented spin-off show "The Xtra Factor" on ITV2, replacing Caroline Flack and Matt Richardson.
 Louis Walsh was the only judge from series 10 to return and was joined by former judges Simon Cowell, and Cheryl Fernandez-Versini, and new judge Mel B.
 Sharon Osbourne, Gary Barlow and Nicole Scherzinger left after series 10.
 Former judge Tulisa returned as a guest judge for the final on 13 December due to Mel B being ill.
 The series also saw the lower age limit decreased from 16 to 14, as it was in series 4 and 5.
 This was Walsh's final series as a judge before returning in series 13.
 It was also the only series in which Mel B was a main judge.
 It was O'Leary's final series as presenter on the main show, as he announced on 27 March 2015 that he was leaving to pursue other projects, before returning in series 13.
 On 11 May, Crawford also confirmed via Twitter that she would leave her position as "The Xtra Factor" presenter.
Una Theresa Imogene Foden (née Healy); born 10 October 1981, is an Irish singer-songwriter, musician, and television presenter.
 She rose to fame in 2008 as a member of the five member English–Irish girl group The Saturdays, signed to Fascination and Polydor Records.
 The group have achieved substantial success with numerous top-ten hits as well as a hit number one single entitled "What About Us".
 In October 2014, it was confirmed that Healy would become a judge on "The Voice of Ireland".
Cearbhall Ó Dálaigh (12 February 1911 – 21 March 1978; ] ) was an Irish Fianna Fáil politician, judge and barrister who served as the 5th President of Ireland from December 1974 to October 1976.
 He served as Judge of the European Court of Justice from 1973 to 1974, the 4th Chief Justice of Ireland from 1961 to 1973, Justice of the Supreme Court from 1953 to 1973 and 9th Attorney General of Ireland from 1946 to 1948 and 1951 to 1953.
Waterloo Road was a British television drama series set in a comprehensive school of the same name, broadcast on BBC One and later also on BBC Three.
 The school was set in Rochdale, England from series one until the end of series seven, and from the beginning of series eight until the end of the show in series ten, the school was set in Greenock, Scotland.
 In 2014, it was confirmed that the 10th series of "Waterloo Road" would be the last.
 The first episode was broadcast on BBC One on 9 March 2006 and the final episode on BBC Three on 9 March 2015.
 "Waterloo Road" ran for 10 series, 200 episodes and exactly 9 years.
 Reruns air on CBS Drama in the UK.
 As of the beginning of August 2017, full episodes of Series One and Series Two have been uploaded to the Waterloo Road YouTube channel.