Question: Spencer List, is an American teen actor, and he made a guest appearance on Bunk'd, an American sitcom that premiered on the Disney Channel, on which date?

Context paragraphs:
Skai Jackson: Skai Jackson (born April 8, 2002) is an American child actress.  She is known for her role as Zuri Ross in the Disney Channel sitcom "Jessie", and is currently starring in the Disney channel series "Bunk'd".

Bunk'd: Bunk'd is an American sitcom that premiered on Disney Channel on July 31, 2015.  The series is a spinoff of "Jessie" and stars Peyton List, Karan Brar, Skai Jackson, Miranda May, Kevin Quinn, Nathan Arenas, and Nina Lu.

Spencer List: Spencer List (born April 6, 1998) is an American teen actor.  List is best known from the Fox show "Fringe" where he played a mysterious mute child in the episode "Inner Child".  He has also been on "" where he played Tate, the son of Leland Orser's character Kevin Walker.  List appeared in Jack Ketchum's "Offspring" in 2009.  He made a guest appearance on the "Disney Channel" show "Bunk'd" in the episode "Luke's Back" as a camp champion camper named Eric, along side his twin sister Peyton List who plays Emma Ross, a camp counselor in training.

List of Bunk'd episodes: "Bunk'd" is an American sitcom that premiered on Disney Channel on July 31, 2015.  The series is a spinoff of "Jessie" and stars Peyton List, Karan Brar, Skai Jackson, Miranda May, Kevin Quinn, Nathan Arenas, and Nina Lu.

John DeLuca: John "Johnny" DeLuca (born April 25, 1986) is an American actor who is known for his role as Butchy in the Disney Channel Original Movie, "Teen Beach Movie," "Teen Beach 2", and as Anthony in coming-of-age comedy "Staten Island Summer".  He also guest starred with Maia Mitchell on an episode of Disney Channel's latest show, "Jessie", along with a guest appearance on "Wizards of Waverly Place".

Twitches Too: Twitches Too is a 2007 Disney Channel Original Movie.  It is the sequel to the Disney Channel Original Movie "Twitches", released in 2005.  The film began production in late April 2007 and was released on October 12.  It aired during "Disney Channel's Halloween Month".  The Disney Channel Original Series, "Wizards of Waverly Place", premiered following the film's premiere.  The first trailer was released during the premiere of "High School Musical 2".  On its premiere night, the movie brought in 6.96 million viewers.  To date, it is the last sequel to a Disney Channel Original Movie that is not a musical.

Peyton List (actress, born 1998): Peyton Roi List (born April 6, 1998) is an American actress and model.  She is known for playing Emma Ross on the Disney Channel comedy series "Jessie" and its spinoff "Bunk'd", and for playing Holly Hills in the "Diary of a Wimpy Kid" film series.  List appeared in various films and television episodes as a young child and modeled for tween magazines and companies.  In 2011, she joined the cast of "Jessie" as Emma Ross, the eldest of four siblings that are being cared for by a teenage babysitter.  In 2015, she reprised the role in the spinoff series "Bunk'd".  She starred in the Disney Channel Original Movie "The Swap" in 2016.

Max Charles: Max Charles (born August 18, 2003) is an American teen actor.  In addition to his appearance in the 2012 film "The Three Stooges", Charles played a young Peter Parker in "The Amazing Spider-Man" and had a role in the ABC comedy science fiction series "The Neighbors".  In 2014, Charles voiced Sherman in DreamWorks Animation's "Mr. Peabody & Sherman".  He also voices Sherman on "The Mr. Peabody and Sherman Show" Netflix Series He also played a recurring role in Disney XD's. " Lab Rats: Bionic Island" as Spin.  He currently voices Kion on the Disney Junior series "The Lion Guard," and Harvey on the Nickelodeon series "Harvey Beaks".  He also plays Zack Goodweather on the TV series "The Strain."

Austin &amp; Ally: Austin & Ally is an American teen sitcom that premiered on Disney Channel on December 2, 2011, and ended on January 10, 2016.  The series was created by Kevin Kopelow & Heath Seifert, the writers and producers of the Disney Channel sitcoms "Sonny with a Chance" and "Jonas".

Donald's Quack Attack: Donald's Quack Attack is an American television series which ran on The Disney Channel and was later rerun on Toon Disney.  It premiered on November 2, 1992, along with "Mickey's Mouse Tracks", on The Disney Channel.  It featured Disney animated short films, especially those with Mickey Mouse, Donald Duck, and Goofy.  Each episode lasted about 22–28 minutes, leaving some time for commercials. .  A similar Mickey Mouse version was called "Mickey's Mouse Tracks", however, unlike "Mouse Tracks", "Quack Attack" was run with a manic energy.  In between the cartoon shorts, a screen would appear with a random background color (pink, blue, green, etc.) With a clip in the corner from a random Donald Duck cartoon.  There was a thermometer with Donald's head on the bottom.  When the clip showed Donald getting angry, the head on the thermometer would go up and make a dinging sound.  This was called the "Quack Attack Meter."  This 10-25 second clip would appear 2 to 4 times per show, depending on how long the shorts were.  The credits for the show did not name anyone.  Instead, it stated, "The cartoons in this program are the work of the animators from THE WALT DISNEY COMPANY over the past 60 years."  When the show premiered in 1992, it was meant to replace "Donald Duck Presents".  It was not possible to know what episode was going to be shown on any given day, but the show did feature showings of some shorts that do not show up on "The Ink and Paint Club" along with some shorts made by the "Fleischer" brothers, and clips from the animated features, such as "Snow White and the Seven Dwarfs", "Pinocchio", "Peter Pan", and "Lady and the Tramp".  "Donald's Quack Attack" aired on The Disney Channel from 1992 to 2000, and on Toon Disney from 1998 to December 2002.  From April 2001 to December 2002, "Quack Attack" usually aired weekdays at 5 a.m., and every night at midnight.  When "Quack Attack" aired on Toon Disney, there were short commercial breaks in between each cartoon, unlike the airings on The Disney Channel.  On some episodes, the first cartoon was cut from the episode to make room for commercial breaks.

Supporting paragraphs: Spencer List Bunk'd
Answer: July 31, 2015