2015

January[]

• 1 - The first wave of 2015 Ninjago sets was officially released in Europe.
• 20 - LEGO Ninjago: Masters of Spinjitzu Season 3 volume 2 was released on DVD in the United States.
• 27 - The Tournament of Elements was released.

February[]

• 23 - "The Invitation" aired in the United States.
• 24 - The Search for Zane and The Rescue Mission were released.

March[]

• 1 - The first wave of 2015 LEGO Ninjago sets was officially released in the United States.
• 2 - "Only One Can Remain" aired in the United States.
• 9 - "Versus" aired in the United States.
• 16 - "Ninja Roll" aired in the United States.
• 23 - "Spy for a Spy" aired in the United States.
• 27 - LEGO Ninjago: Shadow of Ronin was released.
• 30 - "Spellbound" aired in the United States.
• 31 - "The Forgotten Element" aired in the United States.

April[]

• 1 - "The Day of the Dragon" aired in the United States.
• 2 - "The Greatest Fear of All" aired in the United States.
• 3 - "The Corridor of Elders" aired in the United States.
• 28 - Ninja vs. Ninja was released. Breakout! was released.

May[]

• 18 - The Write Like a Ninja contest started accepting entries.

June[]

• 1 - The second wave of 2015 LEGO Ninjago sets and Airjitzu Flyers were officially released in Europe.
• 14 - The Write Like a Ninja contest ended and was no longer accepting entries.
• 16 - Secret World of the Ninja was released.
• 29 - "Winds of Change" aired in the United States.
• 30 - "Ghost Story" aired in the United States.

July[]

• 1 - "Stiix and Stones" aired in the United States.
• 2 - "The Temple on Haunted Hill" aired in the United States.
• 3 - "Peak-a-Boo" aired in the United States.
• 6 - "Kingdom Come" aired in the United States.
• 7 - "The Crooked Path" aired in the United States.
• 8 - "Grave Danger" aired in the United States.
• 9 - "Curseworld, Part I" aired in the United States.
• 10 - "Curseworld, Part II" aired in the United States.
• 12 - The SDCC 2015 Panel took place.
• 28 - Spy vs. Spy was released.

August[]

• 1 - The second wave of 2015 LEGO Ninjago sets and Airjitzu Flyers was officially released in the United States.
• 25 - World of Ninjago: Official Guide was released.

September[]

• 27 - LEGO Dimensions was released.
• 29 - Tournament of Elements and The Way of the Ghost were released.

December[]

• 29 - Attack of the Sky Pirates was released.

Trivia[]

• Simon Lucas and Tommy Kalmar have commented that 2015 was a "big year" for the Ninjago franchise and it was when "everything really blew up," meaning this was a great year of growth for the theme.^[1][2]
• This marks the 2nd year to have 2 seasons release ("Tournament of Elements" and "Possession"), with the 1st being 2012 ("Rise of the Snakes" and "Legacy of the Green Ninja").

References[]