Question: Puffin Rock is an Irish children's television series that originally aired on RTÉjr in Ireland, and in the UK on Nick Jr. Too, (formerly Nick Jr. 2) is the British second channel of Nick Jr. available in the United Kingdom and in the Republic of Ireland, generally presenting popular Nick Jr. programming at other times of the day, it launched on which date? 

Context paragraphs:
Maisy: Maisy is a British-Australian children's animated television series based on the book series by Lucy Cousins.  It is narrated by Neil Morrissey and Brian Greene in the US version.  In the United Kingdom, it was broadcast on CITV (also broadcast on Nick Jr. in 2002 or Network Ten in 2006) In the United States, it aired on the Nick Jr. block of the Nickelodeon cable television network and on Noggin (now Nick Jr.) The series was produced by King Rollo Films and PolyGram Visual Programming and later as Universal Pictures Visual Programming when PolyGram folded into Universal, when the company itself was bought by beverage brand, Seagram.

Puffin Rock: Puffin Rock is an Irish children's television series that originally aired on RTÉjr in Ireland, Nick Jr., Nick Jr.  Too and Milkshake!  in the United Kingdom, Nick Jr. in Italy, ABC Kids in Australia, and Netflix in Ireland, the United States, Canada, Latin America, the Benelux countries, UK, France, and Germany.  The program is narrated by Chris O'Dowd.  The series premiered on 12 January 2015.

Oswald (TV series): Oswald is an American-British children's animated television series originally airing on Nickelodeon as part of the Nick Jr. block.  It first aired on August 20, 2001 in the United States.  The show was created by Dan Yaccarino and co-produced by HIT Entertainment.  It was also broadcast on Noggin and CBS (during the Nick Jr. on CBS programming block) in reruns.

Nick Jr. (block): Nick Jr. is a programming block on the Nickelodeon television channel, seen on Nickelodeon weekday mornings.  It is aimed at young children aged under 7 years.  On February 2, 2009, the Nick Jr. block was temporarily renamed "Play Date" and on September 28, 2009, Noggin was rebranded as the Nick Jr. channel.  In 2014, the Nick Jr. name began to be used for both the block and network.  It is owned by MTV Networks, a division of Viacom International.

Dora the Explorer: Dora the Explorer is an American educational animated TV series created by Chris Gifford, Valerie Walsh, and Eric Weiner.  "Dora the Explorer" became a regular series in 2000.  The show is carried on the Nickelodeon cable television network, including the associated Nick Jr. channel.  It aired on CBS until September 2006.  A Spanish-dubbed version first aired as part of a "Nick en español" block on NBC Universal-owned Telemundo through September 2006; since April 2008, this version of the program has been carried on Univision as part of the "Planeta U" block.  The series is co-produced by Nickelodeon Productions and Nickelodeon Animation Studio.  "Dora the Explorer" is one of the longest-running shows of Nick Jr.  During the sixth season, the show became the Nick Jr. series with the most episodes, surpassing "Blue's Clues" with 143 episodes, having 144 after it had completed broadcasting on television.  It won a Peabody Award in 2003 "for outstanding efforts in making learning a pleasurable experience for pre-schoolers."  It ended on June 5, 2014 after 8 seasons and 172 episodes.

Nick Jr. (Australia): Nick Jr. is a 24-hour children's channel in Australia designed for pre-schoolers.  Nick Jr. was a morning programming block on Nickelodeon until 2004, when Foxtel launched it as a full 24-hour kids channel.  The channel is run by Foxtel Networks, under license from Viacom, and is also available on Optus Television and FetchTV.

Nick Jr.: Nick Jr. is an American digital cable and satellite television channel that is run by the Nickelodeon Group, a unit of the Viacom Media Networks division of Viacom, the channel's ultimate owner headquartered in New York City.  The channel, which is aimed at kids under six years, features a mix of originally-produced programming, and series previously and concurrently aired on the "Nick: The Smart Place to Play" block, and its previous iterations, Nick Jr. also features the shows for preschoolers like "Team Umizoomi," "PAW Patrol," "Bubble Guppies," "Blaze and the Monster Machines," "Shimmer and Shine," and "" on Nickelodeon.  Due to the Nickelodeon block, Nick Jr. is sometimes disclaimed on air as "the Nick Jr. channel" to avert confusion, especially times of day where both Nickelodeon and Nick Jr. are both carrying preschool programming.

Humf: Humf is a British animated children's television program featuring a "furry thing" called Humf.  The show centres on the title character and his daily life with his friends and family.  The show, each episode of which is about 7 minutes long, is produced by King Rollo Films and Rubber Duck.  It is narrated by Caroline Quentin and it is broadcast on Nick Jr. and Nick Jr. 2 in the UK and Ireland, ABC in Australia (15 December 2008 - 30 August 2015) and CBeebies in some international countries.

Nick Jr. Too: Nick Jr.  Too (formerly Nick Jr. 2) is the British second channel of Nick Jr. available in the United Kingdom and in the Republic of Ireland, generally presenting popular Nick Jr. programming at other times of the day.  It launched 24 April 2006, the same day as rival channel Cartoon Network Too.  Nick Jr.  Too carries a schedule separate from the main Nick Jr. channel.  The channel was renamed to Nick Jr.  Too in November 2014.

Nick: The Smart Place to Play: Nick: The Smart Place to Play (formerly Nick Play Date) was the former branding for preschool programming aired between 8:30 a.m. and 2:00 p.m. on Nickelodeon, using a similar branding to the now current Nick Jr. version.  As of 2014, it has been replaced with the revamped version of the Nick Jr. strand.

Supporting paragraphs: Puffin Rock Nick Jr. Too
Answer: 24 April 2006