Why every page says the same thing
Sun sign by date is trivially easy to look up, so it is what gets published. It also happens to be the coarsest fact available. Roughly a twelfth of everyone alive shares it with you, and on a date this far from a boundary it takes no calculation at all.
The position inside the sign is harder to produce and almost never appears. At noon from 1930 to 2035, a 3 May Sun falls between twelve point one and thirteen point five degrees of Taurus. That is a band about a degree and a half wide across more than a century, narrow enough to be worth quoting and specific enough to be worth checking. Nothing on this page needs you to take it on trust: the figure can be recomputed from any ephemeris.
Why the position is so stable
The tropical year is about three hundred and sixty five and a quarter days. A common calendar year is therefore a little short, and the Sun reaches 3 May roughly six hours further along its circuit each year. Every fourth year February gains a day and the accumulated slip is handed back.
The result is a small oscillation rather than a drift. Over a century the solar longitude on this date stays inside a degree and a half of the same spot, which is why a calendar date maps onto a sign at all, and why it fails only at boundaries where a degree and a half is enough to matter.
The Gregorian rule that skips a leap day in three century years out of four keeps the alignment from slipping over longer spans, which is why a range taken from 1930 to 2035 is representative rather than a snapshot of one era.
The decan, which is the layer that distinguishes
Thirteen degrees places this birthday in the second decan of Taurus, from ten to twenty degrees. Two Taurus births a fortnight apart share a sign and sit in different ten degree bands with different traditional rulers, and that is the distinction the popular pages leave out. It is also the reason two people can both be Taurus and find that a decan based reading of their charts diverges immediately.
Counted in the Chaldean order of faces, this band belongs to the Moon. Counted by triplicity, where the earth decans go to Taurus, Virgo and Capricorn in turn, it belongs to Virgo. The tradition reads a Moon face over fixed earth as tending towards attachment and routine, and a Virgo face as tending towards care and correction. Both are interpretive layers on a position that is simply a number.
The parts a date can never supply
The Moon changes sign every two and a half days or so, so a 3 May birth narrows it to two candidates and no further. The rising sign is completely open, since all twelve signs cross the horizon in a day and the rate depends on latitude as well as hour.
Taken together, that makes the sun sign the least personal element of a chart rather than the most. The widget above computes the exact solar degree from your own year and birthplace and reports the distance to the nearest sign boundary, which for this date is comfortably large, and that is a fact you can check rather than a description you have to accept. The hour of birth is what turns the remaining two placements from guesses into answers.
Questions people ask about this
Is 3 May always Taurus?
Yes, at noon in every year from 1930 to 2035. The date sits around thirteen degrees into the sign, far from both adjacent boundaries, so no birth year or hour puts it elsewhere.
What is the exact Sun degree for 3 May?
Between about twelve and thirteen and a half degrees of Taurus across the last century. Your own figure depends on the year and hour and the widget above will return it.
Which decan is this?
The second decan of Taurus, covering ten to twenty degrees. The Sun is comfortably inside it on this date, several degrees from either edge.
Is the decan ruler the Moon or Mercury?
The Chaldean order gives the Moon. The triplicity scheme gives Virgo, whose ruler is Mercury, so both answers appear in print and both are traditional.
Does this birthday give me particular traits?
No, and this page will not claim it does. The tradition attaches descriptions to the sign and the decan, and those are worth knowing as tradition rather than as predictions about a person.
What should I look up next if I want something specific?
The Moon sign and the Ascendant. Both require the birth hour, and both usually contribute more to a chart reading than the sun sign does.