Why did they air all four Tsukimonogatari episodes in one day? The most recent story of the Monogatari series, Tsukimonogatari, has just aired and has all of its four episodes aired on one day. The same thing happened with Hanamonogatari which aired on August 6, 2014. They aired all of its five episodes on that day.

Why did they do that? Why didn't they wait and air 9 episodes over multiple days, or maybe wait some more to make Monogatari Series: Third Season with Owarimonogatari and Zoku-Owarimonogatari? Why did they air all its episodes in one day? What's the point of making it have 4 or 5 episodes when it could also fit in a movie as well?
The reason why Hanamonogatari was all aired on one day was because it kept being delayed because of production issues, it was supposed to come out the Spring season but ended up airing at the very end of Summer season (basically the Fall season). The studio decided to delay it no longer and release it all at once.

See this ANN post

I'm not sure of the exact reason for Tsukimonogatari's bulk airing, but it could be a related reason.