Solar Return Chart Calculator
Your solar return is the moment each year when the Sun comes back to the exact degree it held when you were born, always on your birthday or within a day of it. A chart cast for that moment, at the place where you spend your birthday, is your solar return chart, and astrologers use it to talk about the year from one birthday to the next. Enter your birth date, time and place, choose a year, and the calculator gives you the return moment to the minute, plus the chart's Ascendant and Midheaven, the houses of the Sun and Moon, and the planets in its angular houses.
What a solar return chart is
The Sun travels once around the zodiac every year. At your birth it stood at a particular degree of a particular sign, and every year since, it has passed that exact degree once. That moment is your solar return. The chart cast for it is the solar return chart, sometimes just called the birthday chart.
Reading a year from its return chart is an old technique. Persian and Arabic astrologers of the medieval period, Abu Ma'shar among them, wrote whole books on the revolutions of the years of nativities, and European astrologers carried the method on to the present day. The relationship is simple: the birth chart describes a person, and the solar return chart describes one year of that person's life.
A year is not a whole number of days, so the return moment comes about 5 hours 49 minutes later each year, jumping back by a day after a leap year. That is why every year's return chart has a different Ascendant and different houses, and why the Sun lands in a different house of it from year to year.
Why the birth time and the place matter
The Sun moves only about 2.5 arcminutes an hour. If your birth time is an hour off, your natal Sun is 2.5 arcminutes off, and the calculated return moment shifts by that same hour. The Ascendant changes sign about every two hours on average, so without an accurate birth time the return chart's rising sign and houses can't be trusted. That is why this calculator asks for a birth time.
The return moment is the same instant everywhere on Earth, but the chart's Ascendant, Midheaven and houses depend on where you are at that instant. The calculator uses your birthplace by default. If you spend that birthday somewhere else, tick the box and choose that city: the moment is then shown in that place's local time and the chart is recast for it.
Astrologers have long debated which place to use. The more common practice is the place where you actually spend your birthday, often called a relocated solar return; others insist on the birthplace. Looking at both side by side is a perfectly good way to use them.
How this solar return calculator works
We compute your natal Sun's longitude with the same ephemeris used for our birth charts (astronomy-engine, checked against the Swiss Ephemeris). Then, within four days either side of your birthday in the chosen year, bisection finds the moment the Sun's longitude equals that degree again. The result is within one arcsecond of your natal Sun, timed to the second and shown to the minute.
The return chart is cast for that moment and place with exactly the same method as a birth chart: ten planets, the Ascendant and Midheaven, Placidus houses, with whole-sign houses at high latitudes where Placidus breaks down. Positions are tropical, like your birth chart, with no precession correction.
How to read a solar return chart
Start with the return chart's rising sign. It is often read as the stance you take toward the year and the first impression you give: a fire sign rising, a year for starting things yourself; an earth sign, a year for steady work and tangible results; an air sign, more conversations and people; a water sign, more attention to feelings and the people close to you.
Next, find the house the Sun falls in. The Sun stands for where your energy goes, so its house in the return chart is often taken as the part of life that asks the most of you that year: the 10th is career and public role, the 7th partners and collaborators, the 4th home and family, the 9th travel and study. The Moon's sign and house describe what you need emotionally that year and what helps you feel settled.
Finally, look at the angular houses: the 1st, 4th, 7th and 10th. Planets there carry the most weight in a return chart and are usually read as the year's most visible themes. Venus on an angle puts relationships and taste in the foreground; Saturn on an angle, responsibilities and planning. You can also lay the return chart over your birth chart: the natal house that the return Ascendant falls in often points to what the year is about.
A theme for the year, not a forecast
A return chart doesn't tell you what will happen this year. The same chart can be lived in very different ways. It is more useful as a set of birthday questions: where do I want to put my energy this year, which relationships deserve more time, what helps me feel steady?
Some people travel to spend their birthday in another city because the return chart there looks better, a practice known as solar return travel or birthday travel. It is a personal ritual and there is nothing wrong with it, but there is no need to worry over it either: no return chart is a verdict, only one reading of the same year.
FAQ
Is my solar return on my birthday?
Almost, but not always on the same date. The moment the Sun returns to its birth degree always falls on your birthday or a day either side, because a year is about 365 days and 6 hours and leap years pull the calendar back a day. The calculator gives the exact moment to the minute, in the local time of the place you choose.
Should I use my birthplace or where I live for a solar return?
Both are used. The more common practice is the place where you actually spend your birthday; some astrologers insist on the birthplace. The return moment is the same either way; what changes is the Ascendant, Midheaven and houses. The calculator starts with your birthplace and lets you switch to another city so you can compare.
Can a solar return chart tell me what will happen this year?
No, and we don't use it that way. A return chart describes the year's themes and emphasis, such as which area of life asks more of you and what you need emotionally, not specific events. It works best as a way to set your direction around your birthday; real decisions still rest on your circumstances and your own judgment.
Can I get a solar return chart without a birth time?
We don't recommend it. An hour's error in the birth time moves the return moment by an hour, which can change the rising sign and shifts every house, so this calculator asks for a birth time. If you only know a rough time of day, treat the result as a sketch and don't lean on it.
Why is my solar return chart different every year?
Because the return moment comes about 5 hours 49 minutes later each year, the Earth has turned to a different angle at that moment, so the rising sign and houses change, and the Moon and planets are elsewhere too. Only the Sun's sign and degree stay the same every year; that is what a return means.
How is a solar return different from annual profections?
Both divide life into years from birthday to birthday, but they work differently. Profections count one sign forward from your rising sign for each year of age, a twelve-year cycle that needs no ephemeris. A solar return casts a real chart for the moment of each year's return, with the planets where they actually are. Many astrologers look at both together.