Why the pages all match
Most birthday pages are built from a table of sign date ranges and a short stock description per sign. The date selects a row, the description is pasted in, and a few adjectives are shuffled so the text is not word for word identical. Nothing about the individual date is calculated at any stage.
That is why they can be written for every day of the year in an afternoon, and why the ones for 16 April, 12 April and 9 April read as versions of each other. The method has no way of telling them apart, because the only input it uses is the sign.
The habit is not new and it is not always dishonest. Sun sign columns were built for newspapers where a paragraph per sign was all the space allowed, and the format outlived the constraint that produced it. What changed is that calculating an actual position became trivial, so continuing to publish only the sign is now a choice rather than a limitation.
The position, which is different for every date
At noon in each year from 1930 to 2035, the Sun on 16 April stood between roughly twenty five and a half and twenty seven degrees of Aries. Take twenty six as the working figure. The spread over more than a century is under a degree and a half, because the leap year cycle keeps the calendar and the orbit in step.
That number does separate one date from another. A birth on 1 April sits near eleven degrees and a birth here sits near twenty six, which is a different part of the sign, a different face, and in the older material a different reading. The sign label conceals all of it.
The face, and what the tradition attaches to it
Twenty six degrees falls in the third face of Aries, the band from twenty to thirty degrees. The Chaldean order gives that face to Venus and the triplicity scheme gives it to Jupiter, which is a genuine disagreement between two old systems rather than an error in one of them.
Marked as tradition, the Venus reading treats the band as Mars energy with a sociable edge, and the Jupiter reading treats it as Mars energy with scope and conviction. Neither is a prediction and neither is a personality claim about the reader. They are what two schemes say about a stretch of the zodiac, which is all a decan can honestly be.
What is still missing
Even with the degree and the face, a date carries one body. The Moon on 16 April can be in either of two signs depending on the hour of birth, and in any of the twelve across different years. The ascendant moves through the entire zodiac in a day and cannot be recovered from a date at all.
So the honest summary is short. Sun in the closing third of Aries at about twenty six degrees, cardinal fire, Mars as the domicile ruler. That is the whole of what 16 April fixes. The widget above will replace the range with your exact degree once it has your year, hour and birthplace, and will tell you how far that put you from the nearest boundary.
Questions people ask about this
What sign is 16 April?
Aries, in every year checked at noon between 1930 and 2035. The date sits several days clear of the Taurus boundary, so the hour does not affect the answer.
Why do all the pages about this date say the same thing?
Because they are generated from a sign table and a stock description. The date selects a sign, the sign selects a paragraph, and nothing specific to the date is calculated.
What is the solar degree on 16 April?
About twenty six degrees of Aries, with a full range near twenty five and a half to twenty seven across the sampled century. Your own figure depends on your year, hour and birthplace.
What is a decan?
A ten degree division of a sign, so three to a sign and thirty six around the zodiac. Each has a ruling planet, and the two surviving schemes for assigning those rulers do not always agree.
Does the decan give me different traits?
The tradition attaches a reading to the band, which is worth knowing as tradition. It is not a claim that a date confers a personality, and this site does not make one.
What else should I look up?
The Moon sign and the rising sign, both of which need your hour and birthplace. They vary between people who share this birthday, which the sun sign by definition does not.