WIFI really sucks at midnight - Time Warner Internet

This question is about "WIFI really sucks at midnight", with Time Warner Cable internet and apps. For the last few weeks, I am having some serious connectivity issues. The WIFI at my home doesn't seem to work around midnight, I can't play online games, can't watch Youtube videos. Sometimes the situation seems to be even worse that I can't even search with Google. The connection would resume normal around 2am. But I don't really get it why?

WIFI really sucks at midnight?