The degree almost nobody publishes
Taking noon positions from 1930 through 2035, the Sun on 6 March falls between about 15.0 and 16.4 degrees of Pisces. That is the whole spread across more than a century, and it is a little under a degree and a half wide.
The reason it stays so tight is the leap year cycle. The tropical year runs about a quarter of a day longer than a calendar year of three hundred and sixty five days, so the Sun creeps later by roughly six hours annually and then jumps back when February gains a day. Over four years the drift cancels, and the date and the orbit stay in step.
Because the Sun covers a little under one degree a day, that spread of a degree and a half is really a spread of about a day and a half in the calendar. Nothing dramatic happens inside it. A birth in a leap year and one three years later differ by a fraction that matters for aspects and for nothing else.
The second decan and its ruler
Each sign divides into three bands of ten degrees called decans. Sixteen degrees puts this birthday firmly in the middle band of Pisces, which runs from ten to twenty and is nowhere near either edge.
The Chaldean order gives that band to Jupiter, the traditional lord of Pisces returning by a route that has nothing to do with the sign. The triplicity scheme assigns it instead to Cancer and so to the Moon. Almost no birthday page mentions this layer at all, which is odd, because it is the layer that separates one Pisces birthday from another.
Ten degree bands are old machinery. They come from Egyptian star lists that divided the night by rising groups of stars, and they were folded into Greek astrology long after they were first used. Whatever weight you give them, they are not a modern invention bolted onto the signs.
What tradition attaches to that band
Traditional readings of the middle face of Pisces lean on the Jupiter and Moon pairing: receptive rather than assertive, inclined to widen a situation rather than narrow it. That is what the tradition says, and it is offered here as tradition rather than as a finding about anyone born on the date.
Nothing about a calendar square confers a temperament. What the degree does is locate the Sun precisely, which matters for aspects, for house placement and for whether a decan reading applies to you at all.
What this date leaves open
The Sun is the least personal thing in a chart, because everyone born within a day of you shares it. The Moon moves through roughly half a sign every twelve hours, so a 6 March birth can carry the Moon in either of two signs and sometimes a third, depending only on the hour.
The rising sign is looser still. It turns through the entire zodiac in a day, so any of the twelve is possible on this date, decided by the clock time and the birthplace. The widget above computes your own solar degree from your year and place, and reports how far you were born from the nearest sign boundary.
None of that is a reason to ignore the Sun. It is the anchor the rest of a chart is measured against, and a sun sign reported wrongly quietly spoils everything built on top of it. The point is to get it right, note the degree, and then go looking for the placements that actually vary between two people born on the same day.
Questions people ask about this
What sign is 6 March?
Pisces, in every year. The boundary with Aquarius is well behind this date and the one with Aries is well ahead, so no year, hour or time zone changes the answer.
What degree of Pisces is 6 March?
Between about fifteen and sixteen and a half degrees at noon, depending on where the year sits in the leap cycle. The widget above narrows that to a single figure once it has your year and birthplace.
Which decan is this birthday in?
The second decan of Pisces, ten to twenty degrees. The Chaldean order gives it to Jupiter and the triplicity scheme gives it to Cancer and the Moon.
Does the degree change much from year to year?
Barely. The full spread over the last century is under a degree and a half, because the leap day keeps the calendar and the orbit aligned over each four year cycle.
Do I need my birth time for this date?
Not for the sun sign, which is fixed. You need it for the Moon, which can change sign during the day, and for the rising sign, which changes roughly every two hours.
Why does every other page about this date say the same thing?
Because most of them stop at the sign and add adjectives. The position, the decan and the distance from the nearest boundary are all checkable, and they are what actually distinguishes one Pisces birthday from the next.