The ARTPOP era as its name implies refers to the album cycle for ARTPOP. Although the album was released on November 11th, 2013, the era began on July 11, 2013, when Gaga announced the single and album release date. The era ended on November 24, 2014, when Gaga closed the final artRAVE in Paris.
Note: 2011 and 2012 are in the Born This Way era, but Gaga started hyping ARTPOP at that time, but the ARTPOP era had not officially began yet.
Gaga began recording ARTPOP in 2011 and even started dropping hints about the album in later 2011.
Throughout 2012, Gaga teased the album calling it her favorite album of her's. She revealed a lot of details about ARTPOP through chat rooms on LittleMonsters.com
Gaga revealed the album title on August 3rd, 2012.
The album was originally planned for an early 2013 release but was postponed when Gaga hurt her hip while performing on the Born This Way Ball Tour in February 2013. That also resulted in the cancellation of the remainder of the Born This Way Ball.
July 11th. Lady Gaga announced ARTPOP release date (November 11th) and date of the artRave launch party (November 10th), which marked the beginning of the ARTPOP era.
August 5th. A demo version of "Aura" has been leaked online.
August 12th. Initially the album's lead single "Applause" was scheduled to be released on August 19th but due to snippets of the song being leaked online by hackers prior to its release, "Applause" was released a week earlier.
August 12th-13th. The pre-order of the upcoming album ARTPOP started on August 12th in a few countries and on August 13th in the rest of the world.
August 16th. Lady Gaga confirmed via LittleMonsters.com that she will be the headliner of the iTunes Festival 2013. She called her forthcoming performance as the "SwineFest".
November 4th. A song "Dope" was released as the second promotional single from the album.
November 10th. Lady Gaga took part in artRave launch party. She presented "the flying dress" VOLANTIS created by techHaus and Studio XO, the upcoming app ARTPOP, and the ARTPOP sculpture created by Jeff Koons. She also performed with nine songs from the upcoming album.
November 11th. The album ARTPOP and the app was released worldwide at the same day.
November 16th. A Saturday Night Live with Lady Gaga as both the host and musical guest debuted today.