@JohnRennie Haha, cool! You may also like to have a look at this lecture by Hawking. He argues that we say that time essentially begins at the big bang because the entire universe we are causally disconnected to whatever might have happened before the big bang. So maybe that is what you meant when you said that we call it the beginning because it is a singularity.
http://www.hawking.org.uk/the-beginning-of-time.html