Example 1
- Date: 1990-05-15
- Time: 08:00
- Longitude: 21
Virgo (Earth)
Taurus + shift floor(9.4/2)=4 → Virgo.
Rising sign with longitude calculator
The simple hour model gets geographic longitude added. It is still a paper sketch, without latitude, a time zone, or an ephemeris.
Here the hour model is extended with geographic longitude. This tool is for entertainment and learning, not fortune-telling or life advice. It does not replace personal, medical or financial decisions. For the simpler version without longitude see rising sign; also try the zodiac sign.
Result
Pick a date, time and longitude to see the approximate rising sign.
How it works
Rising with place in full astrology needs latitude, a time zone and an ephemeris. Here you get only an educational extension of the simple hour model with geographic longitude.
First we take the tropical Sun sign from day and month (as in the zodiac sign tool). Then we compute effective hours: effectiveHours = clockHours + longitude_°E / 15, wrapped into 0-24.
Shift: shift = floor(effectiveHours / 2) (mod 12). Rising = Sun sign moved by shift places in the Aries → .. → Pisces cycle. Same idea as rising without longitude, except the clock is nudged by longitude/15 hours.
Example: 15 May 1990 (Taurus), 08:00, longitude 21 (Warsaw). effectiveHours = 8 + 21/15 = 9.4 → shift 4 → Virgo. Same date at 15:00 with 21°: 15+1.4=16.4 → shift 8 → Capricorn (without longitude it would be Sagittarius).
Another case: 8 August 1988 (Leo), 14:30, -74 (about New York). effectiveHours ≈ 9.57 → shift 4 → Sagittarius. Without longitude the same clock time yields Pisces (shift 7).
1 January 2000 (Capricorn), 06:00, 21° → effectiveHours 7.4 → shift 3 → Aries. 7 July 1977 (Cancer), 22:00, 139° (about Tokyo) → ≈7.27 → shift 3 → Libra.
We do not compute houses, MC, latitude or a true horizon. It is a didactic calendar model. Enough to learn the 12-sign cycle and how longitude nudges the “clock”; not enough for a birth chart.
The element shown is the rising sign’s element, as in the zodiac element tool. It helps compare labels; it does not grade character.
Treat the result as a drill: date + time + longitude → shift. Do not read it as fortune-telling, a personality diagnosis or life instruction.
Formula
sun = tropical_table(month, day)
effectiveHours = (H + M/60 + longitude_°E / 15) mod 24
shift = floor(effectiveHours / 2) mod 12
rising = sun + shift (Aries...Pisces). Educational; not full houses.
How to use the calculator
- Type the value in “Date of birth” using the unit printed on that label, not a different scale.
- Fill “Local clock time” or the other fields if this page’s formula needs them.
- Enter longitude in °E (e.g. 21 or -74).
- Click Calculate or wait for the live result.
- Compare with the simpler <a href="rising-sign.html">rising sign</a> without longitude.
Suggested uses
- Learn how longitude nudges an educational rising “clock”.
- Compare the same date and time for Warsaw (21) and Greenwich (0).
- Pair with the simpler rising tool without longitude.
- Practice floor((hours + lon/15)/2) on concrete cases.
- Workshop: why a real rising still needs latitude and an ephemeris.
- Short “date+time+place profile” for a class (entertainment).
Examples
Example 2
- Date: 1990-05-15
- Time: 15:00
- Longitude: 21
Capricorn (Earth)
effectiveHours 16.4 → shift 8 → Capricorn (without lon: Sagittarius).
Example 3
- Date: 1990-05-15
- Time: 00:00
- Longitude: 21
Taurus (Earth)
effectiveHours 1.4 → shift 0 → Taurus (= Sun sign).
Example 4
- Date: 1988-08-08
- Time: 14:30
- Longitude: -74
Sagittarius (Fire)
Leo + shift floor(9.57/2)=4 → Sagittarius (without lon: Pisces).
Example 5
- Date: 2000-01-01
- Time: 06:00
- Longitude: 21
Aries (Fire)
Capricorn + shift floor(7.4/2)=3 → Aries.
Example 6
- Date: 1977-07-07
- Time: 22:00
- Longitude: 139
Libra (Air)
Cancer + shift floor(7.27/2)=3 → Libra (without lon: Gemini).
Example 7
- Date of birth: 2026-03-02
- Local clock time: 10
- Longitude (°E): 21
Result on the card after fill
What is rising sign with longitude calculator for 2026-03-02, 10, 21?
Example 8
- Date of birth: 2026-06-12
- Local clock time: 14.95
- Longitude (°E): 24.15
Result on the card after fill
What is rising sign with longitude calculator for 2026-06-12, 14.95, 24.15?
Related calculators
Frequently asked questions
How does this differ from plain rising sign?
The simpler rising sign uses shift = floor(hours/2). Here we add longitude/15 to the clock first, then take floor(/2).
How should I enter longitude?
In east degrees: Warsaw ≈ 21, London ≈ 0, New York ≈ -74, Tokyo ≈ 139. Range -180...180.
Does latitude count?
Not in this model. We do not build a horizon or houses. It is only a longitude nudge to the “clock”.
Why can the result differ from the no-longitude tool?
Because effectiveHours can cross the next 2-hour threshold. E.g. 15:00 at 21° becomes 16.4 → a different shift than 15 alone.
Is this a real sky rising sign?
No. A full rising needs an ephemeris, latitude and a time zone. Here you get a repeatable teaching model.
Which time format?
HH:MM in 24-hour form, e.g. 08:00 or 14:30. Hour 0-23, minutes 00-59.
What about minutes and fractional longitude?
Minutes enter hours as a fraction. Longitude may be decimal (e.g. 21.0). Comma or dot is fine.
Is this fortune-telling or a diagnosis?
No. The calculator is for entertainment and learning. It does not replace specialist advice or life decisions.
Why is 1990-05-15 at 08:00 with 21 E Virgo, but 15:00 Capricorn?
Seven hours is about 3-4 signs in this model. Warsaw 21 E at 08:00 is Virgo, at 15:00 Capricorn. The same date with no time does not move the rising sign.
What if the date is blank but 08:00 and 21 E are filled?
The card does not calculate. It needs date, time and longitude. Type 1990-05-15 or load the example. A blank date is not Taurus at midnight.