Why is my birth time important?

In order to create an accurate birth chart, you need your exact birth time (hour and minute). Two very important points in the chart, the Ascendant (Rising) and Midheaven, are fast moving (yes - a minute can make a difference). These points determine the house placement of all the planets. You chose an exact moment to be born, and the birth chart is a cosmic reflection of you - a mirror for self-discovery.