If you want to get into playing the piano, it’s a good idea to get a basic understanding of how the instrument works. Before you even sit down at the piano bench, or sign up for lessons, educating yourself about the instrument gives you a base to start from, and may even help you decide if it’s the right choice of instrument for you.
Rhythm is how we perceive and measure time. Humanity awoke to the awareness of passing of time in the passing of days and seasons. Logically, then, days and years became the basis of the language of time.