Lore Events highlight a specific person or thing happening. They can cross between servers. The best ones end in big, dramatic changes that affect all characters. These Events will be sorted by when they took place/will take place.
The Kamabo Takeover Lore Event took place July 22-25, 2019.
The Kamabo Event is what set off the chain of events that led to the creation of the lore as we know it. After Splatoon 2's Final Splatfest, some mysterious messages in Base64 started to pop up. It turned out to be Commander Tartar looking for revenge on the fools who had brought Chaos to victory. 7705, who had recently been Rejuvenated (although all characters were new at this point, and this becoming canon was unpredictable), decided to team up with Tartar, and being the only supporter in the server, quickly rose to power. However, Pearl showed up, and with her help, the other server members, annoyed and confused as to what was happening (there was zero lore, everyone had been taken by surprise), destroyed Tartar. 7705 attempted repairs, but as to whether Tartar is still alive is unknown.
The Spinel's Game Lore Event took place October 29, 2019 3:45-11:00 PM MST.
Spinel had been acting strangely and had started attacking. Around this time, Spinel's history as a Gem and her backstory as being Rejuvenated was just being made. Spinel had been acting extremely hostile for no apparent reason and had just formed The Collective. Out of nowhere, she started telling people that she wanted to play a game. This was originally taken as a threat, but Spinel explained the game as Team Ultimate Tag- if someone tags you, you're "out", but if someone tags the person that tagged you, you're back "in". Spinel shattered before the Game began and was thus unable to participate. The teams were The Spades, led by Kim (formerly Spinel), with members from the Collective and a few others, and the Hatsters, led by Hat Kid, which had the other participating characters. The Hatsters, despite their small numbers, quickly overwhelmed the other team and won. No prize or award was given, but the planet the game was taking place on was left unharmed.
The Akyru Event is still taking place. It began on December 5th at 5:00 AM MST.
The Event is not quite in full swing. It's purpose is unknown other than a message from a webhook named Lysteria in #da-mo0n saying "Soon."
Zimberly takes the Moon
This started the whole Break the World meta event.
The Hanged King Event
The Noose of Madness
The Hive invasion.
Storm The Dreadnaught.
Long Live The King
End The Armada once and for all.