The city changes the houses
Planetary degrees stay almost the same wherever you are, but the horizon changes. The birthday city therefore changes the Ascendant, Midheaven and houses.
Calculate your solar return
Your solar return begins at the exact moment the Sun returns to the degree it occupied when you were born. It is the chart of your personal year, calculated for the city where you spend your birthday.
What a solar return is — and is not
It does not start on January 1 or necessarily at your birth time. It begins when the Sun reaches your exact natal longitude, usually near your birthday, and lasts until the next return.
The Sun carries the plot
The Sun’s house shows the central chapter. The Ascendant describes how you enter it and the Moon what you need emotionally along the way.
The birth chart remains underneath
The solar return does not replace your birth chart. Contacts between them show which parts of your personal story receive more pressure, support or movement.
The time and planetary positions are astronomical calculations. Solar return interpretation is an astrological tradition: it describes possible themes and rhythms, not inevitable events.
What is a solar return?
A solar return is a chart for the exact moment the Sun returns to the longitude it occupied when you were born. It happens close to your birthday, but not necessarily on the same date or at your birth time. That moment opens a personal cycle lasting until the next return.
This calculator first finds your natal Sun, then its exact return in the chosen year, and finally calculates the Ascendant, Midheaven and twelve houses for that instant.
Why the exact birth time matters
Your birth time fixes the Sun’s precise position and allows the annual chart to be compared with the full birth chart. The yearly Ascendant also moves quickly, so a small difference can change house positions.
Does the birthday city matter?
The planetary longitudes do not change when you travel, but the local horizon does. A different city changes the Ascendant, Midheaven and houses—where the year’s themes appear. Travel changes the setting, not every part of the story.
How to read your result
Begin with three pieces: the Sun’s house is the central plot, the Ascendant describes how you enter it, and the Moon shows your emotional climate. Then read the life areas and the tightest links to your birth chart.
The gold positions belong to the solar return; the violet ones to your birth chart. A square does not promise misfortune and a trine does not guarantee a reward: they describe tension, ease and choices.
The twelve-month calendar
The calendar divides the real time between two returns into twelve equal periods and follows one house per section. It is a guide to themes, not a clock of guaranteed events.
A yearly compass, not a sentence
The timing and positions are calculated astronomically. Their interpretation belongs to astrological tradition and works best as a map of questions, not as medical, legal or financial advice.