Sun sign boundary
Pisces-Aries cusp
Your Sun is in Pisces before it reaches 0° Aries, and in Aries from that boundary onward. The birth year and moment decide which sign applies.
Check the transition for your birth year
Choose a year from 1900 to 2026. No birth details are saved by this lookup.
Approximate universal times for the Sun entering Aries. The highlighted row is your selected year.
| Year | Date | Time · UT |
|---|---|---|
| 2025 | 2025-03-20 | ≈ 09:01 |
| 2026, selected year | 2026-03-20 | ≈ 14:46 |
Times are rounded estimates, not exact birth cutoffs. Your local clock can show a different time or date. Use the calculator for time-zone conversion and births close to the boundary.
Calculate my birth chartResponsiveness and initiative
Pisces is mutable water: its solar theme concerns responsiveness and changing perspectives. Aries is cardinal fire: its theme concerns initiating a direction. The zodiac wraps from the end of Pisces back to 0° Aries, so the change is also the 360° boundary.
Pisces
Water · Mutable
Traditional ruler: Jupiter
Read Sun in PiscesAries
Fire · Cardinal
Traditional ruler: Mars
Read Sun in AriesTwo sign themes can come from different planets
A hypothetical Sun at 29° Pisces with Mercury at 2° Aries can combine a responsive purpose with direct speech. Longitude wraps through 0°; it does not skip a region between signs. A Sun exactly at 0° Aries belongs to Aries.
Read the Sun as the purpose or identity theme, Mercury as thought and communication, and Venus as appreciation and relating. Each placement contributes something specific.
An unknown time can leave the sign unresolved
If the Sun crosses this boundary during the possible birth period, both signs remain possible. Astriel keeps that uncertainty visible instead of substituting a noon chart.
Choose an approximate interval or unknown time in the calculator. The birthplace supplies the historical time zone. A single local calendar date can include times on both sides of the transition.
A house cusp is a separate question
These dates concern the Sun's zodiac sign. In Placidus, Astriel's default, house membership follows calculated cusp degrees. A sign change does not automatically change the Sun's house.
Read the Placidus house guideCalculation, precision and sources
The table uses the same apparent geocentric tropical Sun positions as Astriel's chart engine. Times use Astronomy Engine 2.1.19 and its Espenak-Meeus conversion between universal and terrestrial time.
Universal time follows Earth's rotation; modern UTC is the civil clock standard kept close to it. Historical dates before 1962 use universal time rather than a UTC clock that did not yet exist.
Independent checks against NASA/JPL covered twelve transitions in each of six sample years. Position and time-scale differences remain, so minute display is not a one-minute accuracy guarantee. Future birth years are excluded.
Interpretations follow the owner-supplied astrology reference, sign boundaries and sign classifications. The planetary example is hypothetical. No personality trait is established by an astronomical degree.
Astriel's methods and limits · NASA/JPL coordinate and time-scale documentation