Halevai this should be the greatest issue facing klal yisrael. One day a year many people (re)connect with chassidus, try something that may be new to them, maybe find another way to connect with Hashem – typically through music and chassidishe torah.
The idea of having a special day of dveikus to commemorate a nes or hatzalah is an ancient practice. Joining your neighbor as they celebrate what happened for their rebbe is the same idea.
Having a taste of something refreshing and new – a deeper more spiritual and emotional way to relate to HKBH is at the core of chassidus and hischadshus. This isn’t chassidus out of context. It’s very much chassidus at it’s best.