A position that holds still
The measurements run from roughly thirteen and nine tenths of a degree of Virgo up to about fifteen and a third. In a hundred and six years the Sun has never been anywhere else at midday on this date.
The reason is the design of the calendar. A tropical year is a little under three hundred and sixty five and a quarter days, so each ordinary year the same date arrives about six hours early against the Sun's actual position, and the Sun appears to have moved forward. Adding a day every fourth February pushes it back the other way. The two effects nearly cancel, and what is left is a small oscillation with almost no long term drift. Any date in the year behaves this way, which is why the sign attached to a date is so nearly reliable.
Where that lands inside the sign
Fourteen degrees is squarely in the second of Virgo's three ten degree bands. The bands come from Egyptian astronomy, where thirty six of them marked the hours of the night, and the planetary rulers were attached centuries later by Hellenistic writers.
The Chaldean order assigns this band to Venus, arriving there by running the planets in order of apparent speed from Saturn down to the Moon and counting continuously from the start of Aries. A different scheme, based on the element, hands Virgo's bands to Venus, Mercury and Saturn in turn and so gives this one to Mercury. Both appear in print with equal confidence, and a reader who searches for the answer will find contradictory claims within minutes. The honest position is that the assignment is a convention, while the degree it applies to is measured.
The sign, stated without hedging
Virgo is mutable earth under Mercury, and 7 September is nowhere near either edge of it. The Sun entered the sign more than two weeks earlier and leaves more than two weeks later, so no combination of birth year, clock time and time zone can produce a different answer.
Tradition reads the sign as attentive to method and to the difference between roughly right and actually right, and Mercury's rulership is where the emphasis on analysis and language comes from. The second decan under Venus is usually said to soften that towards making and arranging rather than examining. Those readings are inherited descriptions, not findings, and they are worth holding at that distance.
What a date cannot tell you
On this birthday the Moon can be in either of two adjacent signs, occasionally a third if a change of sign falls near the ends of the day in your time zone. That single placement changes the emotional half of a traditional reading entirely, and the calendar date is silent about it.
The rising sign is worse. It cycles through all twelve signs in a day, so this date rules out none of them and only the hour of birth decides. The same is true of every house cusp, and therefore of where each planet falls in the chart. Two people born on the same 7 September, a few hours apart, can share a sun sign and almost nothing else. That is the ordinary situation rather than an unusual one.
Questions people ask about this
Is a 7 September birthday Virgo or Leo?
Virgo, with no ambiguity. Leo ends around 22 August in every year, more than a fortnight earlier, so this date has never fallen outside Virgo in the modern calendar.
How much does the Sun's position on this date vary?
By about one and a third degrees across the last century, measured at noon. The leap year cycle keeps pulling the date back into step, so it never drifts far in one direction.
Which decan does 7 September fall in?
The second, covering ten to twenty degrees of Virgo. Chaldean rulership gives it to Venus and the triplicity scheme gives it to Mercury, so you will see both cited.
Can two people born on this date have different charts?
Almost always, yes. The rising sign alone can be any of the twelve depending on the hour, and the Moon has two or three possibilities. Only the Sun is shared.
Does the exact degree change my sun sign reading?
Not the sign itself. It affects which decan applies and which aspects the Sun makes to other planets, both of which tradition treats as qualifying the description.
How do I find my exact solar degree?
Enter your birth year, time and place in the widget above. It computes the longitude for that moment and reports how far it stood from the nearest sign boundary.