"Astrological Sign" is not accurate/apt enoughEdit
The text "A person's astrological sign is based on his birthday" requires some clarification for 'political correctness'. Please consider allowing my edit of "astrological Sun sign" instead.
Same goes for the table label "Sign". It's simply not specific/accurate enough (it should be changed to 'Sun Sign' instead; if you don't understand why it's important to make this distinction, I invite to you thoroughly peruse the two newer links as listed in the Other Websites section, for a start :).
This refusal would only encourage a misconception of what "astrological sign"s are.