Like Yume Nikki and its many fangames, Someday has multiple events, ranging from minor special interactions to cutscenes that can permanently change some mechanics in the game once seen. This article lists many of these events, their locations and the steps required to trigger them. Many of the events of this game also unlock Feats.
Note that the article doesn't list every event in the game, focusing only on the most remarkable ones from the perspective of wiki users.
Alley Chase
For the associated feat, see: Stranger.
Are you Kondo?
For the associated feat, see: Kondo (feat).
Bad Omen
For the associated feat, see: On Fire.
Bubbly event
For the associated feats, see: Oxidation and Reduction.
Bully Chase
For the associated feat, see: Rise Up.
Canvas Coloring
For the associated feat, see: Canvas.
Cracked Ice
For the associated feat, see: Fallen.
Corrupted School
For the associated feat, see: Perspective.
Empty Gallery
For the associated feat, see: Silent Laughter.
Fake ZapNeF Level
For the associated feat, see: Trapped.
Flying Tuna
For the associated feat, see: Colours.
Haunted House
For the associated feat, see: Paralyzed.
Snowy Day
For the associated feat, see: A Snowy Day.
Spaceship Flight
For the associated feat, see: Careful Cruise.
Spoiled Mentsuyu
For the associated feat, see: Dizziness.
Vaporwave Mall
Wasp Overrun
For the associated feat, see: Wasps.