2012

January[]

• 1 - Cole: Ninja of Earth and Jay: Ninja of Lightning were released. The first wave of 2012 Ninjago sets and spinners/booster packs were officially released in the United States.^{[note 1]}
• 25 - "Snakebit" aired in the United States.

February[]

• 1 - "Never Trust a Snake" aired in the United States. Masters of Spinjitzu was released.
• 8 - "Can of Worms" aired in the United States.
• 15 - "The Snake King" aired in the United States.
• 22 - "Tick Tock" aired in the United States.
• 28 - Mask of the Sensei was released.

March[]

• 1 - The second wave of 2012 LEGO Ninjago spinners were officially released in the United States.
• 7 - "Once Bitten, Twice Shy" aired in the United States.
• 14 - "The Royal Blacksmiths" aired in the United States.
• 21 - "The Green Ninja" aired in the United States.
• 22 - LEGO Ninjago: Rise of the Snakes was released.
• 28 - "All of Nothing" aired in the United States.

April[]

• 1 - Viper Smash was released.
• 4 - "The Rise of the Great Devourer" aired in the United States.
• 11 - "Day of the Great Devourer" aired in the United States.

May[]

• 1 - Rise of the Snakes and The Golden Weapons were released.
• 22 - Rise of the Serpentine was released.
• 23 - The second wave of 2012 LEGO Ninjago sets and spinners/booster packs were released at select Toys R Us stores.

June[]

• 1 - The second wave of 2012 LEGO Ninjago sets and spinners/booster packs were officially released in the United States.
• 26 - LEGO Ninjago: Masters of Spinjitzu season one was released on DVD in the United States.

July[]

• 18 - "Darkness Shall Rise" aired in the United States.
• 25 - "Pirates vs. Ninja" aired in the United States.

August[]

• 1 - The third wave of 2012 LEGO Ninjago spinners and booster packs were officially released in the United States. "Double Trouble" aired in the United States.
• 2 - Ninja vs. Hypnobrai was released in the UK.
• 8 - "Ninjaball Run" aired in the United States.
• 15 - "Child's Play" aired in the United States.
• 19 - A-W-E-S-O-M-E was released.
• 21 - Tomb of the Fangpyre was released.
• 22 - "Wrong Place, Wrong Time" aired in the United States.

September[]

• 1 - Snake Attack! was released.

October[]

• 1 - A Ninja's Path was released.
• 3 - "The Stone Army" aired in the United States.
• 4 - Ninja vs. Venomari and Ninja vs. Constrictai were released in the UK.
• 10 - "The Day Ninjago Stood Still" aired in the United States.
• 17 - "The Last Voyage" aired in the United States.
• 24 - "Island of Darkness" aired in the United States.
• 30 - Kingdom of the Snakes was released.

November[]

• 7 - "The Last Hope" aired in the United States.
• 14 - "Return of the Overlord" aired in the United States.
• 21 - "Rise of the Spinjitzu Master" aired in the United States.

December[]

• 17 - Ninjago's continuation beyond 2013 is officially announced in a post on the LEGO Message Boards. A teaser poster of Zane was attached to the post.
• 31 - The Legacy of the Green Ninja wave of LEGO Ninjago sets were released at select Toys R Us stores and Amazon.com.

Unknown[]

• A trailer was released for Season 2: Legacy of the Green Ninja.

Notes[]