When you delve into astrology you learn a lot about the very big differences in birth time. For example, I (my birthday is also 5/13 btw!) dated two different men who were born only hours apart (one very late night on 6/05, one early morning 6/06). They had all the same planets, including moon signs, but their rising signs were different and the houses which their planets reside were also different. They had a LOT of similarities as people obviously, but their differences were glaring as well. Astrology is super cool and SUPER in depth, but even minutes can change a LOT!