The following shows significant events that happened in 2021 for Ninjago.
This year marks the ten year anniversary of LEGO Ninjago when the first episode was released.
- 1 - Ninjago: Legacy Wave 4 sets were released.
- 14 - Ten year anniversary of the pilot episodes, which marked Ninjago a decade old. 71741 Ninjago City Gardens was released for LEGO VIP members.
- 22 - Jake Pennar, Jake's namesake, passed away at the age of nine.
- 23 - The Island trailer was released.
- 29 - LEGACY shorts - Reimagined Trailer was released.
- 1 - 71741 Ninjago City Gardens was released to the public.
- 5 - The Island teaser trailer was released.
- 12 - The Island trailer was released.
- 1 - The Island wave of sets and 71740 Jay's Electro-Mech will be released in the US.
- 4 - Character Encyclopedia New Edition will be released.
- 7 - Season 14 begins in Canada with episodes "Uncharted" and "The Keepers of the Amulet."
- The Uncharted Island will be released.
- Rescue Mission will be released.
- Season 15: Seabound will be released.
- Spinjitzu Brothers will be released.
January 14, 2021 marked 10 years since the release of the pilot episodes. On this occasion, a number of promotional materials were released to celebrate the anniversary. Ninjago: Legacy sets included golden minifigures of the ninja and Wu with special pedestals. 71741 Ninjago City Gardens was released. A four-part series featuring the soundtrack of the show, called NINJAGO: A Musical Journey, began to be released on the LEGO YouTube channel. An official interview was made with Tommy Andreasen, a video interview with Tommy Andreasen and Tommy Kalmar, and three other unofficial interviews were made via the LEGO Ambassador Network with Tommy Andreasen, Michael Knap, and Simon Lucas in one case. The series of shorts called Ninjago: Reimagined will be released.
- This year marks the five-year anniversaries of Skybound, "Day of the Departed", and the Dark Island Trilogy, as well as the ten-year anniversaries of the pilot episodes and the first two episodes of Rise of the Snakes. For the exact dates, see 2016 and 2011.