Day chart
If the Sun is above the horizon, the Sun leads the chart. Jupiter and Saturn are in sect with it.
Day or Night Chart Calculator
Is your birth chart a day chart or a night chart? Find your astrology sect from the Sun's position above or below the horizon, then read it in the context of your free natal interpretation.
Day or night chart
Planet-by-planet sect condition
Free, no signup
Find your chart's sect
Enter the birth details below. The free reading opens on our chart page and identifies your chart as diurnal (day) or nocturnal (night). Use the recorded local birth time, not a time converted to another timezone.
Birth time unknown? A noon placeholder cannot establish sect. You can get a limited natal reading without a birth time, but the day/night conclusion will be omitted.
Historical Use Only. For historical study, reflection, and entertainment; not medical, financial, legal, psychological, emergency, or safety advice.
What the calculator does
The free birth chart calculator determines sect as part of the natal chart calculation. It does not guess from clock time alone. It calculates the chart, places the Sun relative to the horizon, and labels the chart as diurnal or nocturnal.
Night chart
If the Sun is below the horizon, the Moon leads the chart. Venus and Mars are in sect with it.
Mercury
Mercury is treated separately because the classical tradition judges it by its relationship to the Sun.
Why sect matters
Sect changes how the benefics and malefics operate. Jupiter is still a benefic in a night chart, but it is out of sect and may overpromise or distribute benefits less reliably. Mars is still a malefic in a night chart, but it is in sect and can be more focused, disciplined, and constructive.
That is why traditional astrologers do not read Mars, Saturn, Jupiter, or Venus the same way in every chart. Sect is one of the first conditions checked before making a judgment.
How to use the result
- Generate your free chart with birth date, time, and location.
- Find the sect note in the reading: day chart or night chart.
- Read benefics and malefics through that condition before judging any single placement.
Calculate your sect now
The free chart preview includes sect because day/night distinction is not optional in traditional astrology.
Calculate My ChartDay and night chart questions
How do I calculate sect in astrology?
Sect depends on whether the Sun is above or below the local horizon at birth. Above the horizon is a day chart; below it is a night chart. Date, local birth time, and birthplace are needed to calculate that position.
Which planets are in sect in a day chart?
The Sun, Jupiter, and Saturn belong to the day team. The Moon, Venus, and Mars belong to the night team. Mercury is considered separately through its relationship to the Sun. Sect is one condition among several, not a complete judgment about a planet.
Which planets are in sect in a night chart?
The Moon, Venus, and Mars belong to the night team. The Sun, Jupiter, and Saturn belong to the day team. Mercury is considered separately through its relationship to the Sun.
Does being born before 6 pm always mean a day chart?
No. Sunrise and sunset depend on the date and birthplace. A fixed clock-time cutoff does not establish sect. Near sunrise or sunset, even a small uncertainty in the recorded birth time can matter.
Once you know your sect, use the appropriate formula in the Lot of Fortune calculator. To place the planets by house, use the Whole Sign houses calculator.