I'm asking because I know I'm not the only one, someone else mentioned the same thing here once, and that makes me fairly curious.
:P
Video explains it in detail about why this happens.
About: "Like, almost 1.5x faster." You can check your perceived time by traveling the same distance you have traveled as a child (trip to grandparent, local lake for swimming etc.). If you are not 50% faster at your location, its surely your perceived time that has changed.
That makes it seem to me that every day is Thursday. When there's only, on average, 4 Thursdays a month, a year just flashes past.