Excerpt from my latest Sasstrology article (please leave comments on the Sasstrology site):
"Any astrologer will tell you that you need an accurate birth time (for both partners) to get an accurate synastry and composite analysis. If one person’s birth time is unknown or vague, it can skew the entire reading. But sometimes, you simply don’t know the exact minute someone was born. This is especially true if that someone is a potentialpartner you’re not intimate with (yet). Is it still possible to get an accurate reading? This article will explore that question. Note that this is not a how-to article about chart rectification. Rectification is a technically demanding method of calculating birth time by working backwards from major life events."