I am an Aquarius, I do not know the exact time of my birth, but I know it was late in the afternoon so I put in 5 PM.
The character analysis I get based on that info is so broad that it, unsurprisingly, contains some uncanny hits, but also some uncanny misses, while at times contradicting itself. Apparently the stars think it is possible to be both "extremely objective, with good powers of observation and fit for the study of technical and complicated subjects" and "A very subjective person, you tend to reject ideas that are based solely on logic."
I am not too impressed by your ability to to name 3/12 signs and get the right one, nor am I impressed by the accuracy of the description. Not that the anecdotal evidence of your guess and this description would have any effect on my stance towards astrology. Astrology has no plausable explanatory mechanisms that do not contradict everything we know, lacks falsifiability and has been proven to not be empirically significant. Confirmation bias is a bitch.
Well, since you didn't enter your exact time of birth, it won't be as accurate as it would have otherwise.
That's all fine, I didn't intend to try and assuade you from your rigid beliefs (since you're skeptical and as you said, it's not falsifiable - which is the only basis that skeptics accept when it comes to new information).
I named two air signs and one fire sign, which I figured would be most likely to be a hit based on your emotionally detached, rational and logical personality. In retrospect, the Sagittarius guess was kind of a long shot. However it's never a surefire guess since supposedly we have many aspects that play into personality when discerning through astrology, such as your moon sign and your Rising sign.
Supposedly, our sun sign is what type of energy we emanate (or in other words, the ideas that you wish to represent through your actions, your words, your life, your ambitions), our moonsign is our inner side that we show only to our nearest and dearest and our rising sign is allegedly the "mask" that we wear in public.
I suspect that Xant is highly likely either Sagittarius or Gemini, or that he has one of those signs in either his Rising or Moon sign but, he would have to confirm that by calculating his birth chart. The reason for this is his compulsion to make a joke out of everything, which is incredibly typical of Sagittarius sunsigns.
I personally find my combination, and many descriptions of it to be quite accurate. These are of course mere tendencies and markers of what your personality may be like, not definitions of who you are since we are all unique individuals, raised in unique circumstances.
I'm also Aquarius, my moon sign is Aries and my rising sign is Cancer (hurhur).