Western zodiac sign calculator
A March 25 birthday falls under Aries, the sign that runs from March 21 to April 19. Enter a birth month and day to get the sign, its symbol and its date window for a profile, a sign-up form or a class. Free in your browser.
- Free
- Runs in your browser
- No sign-up
- Your data stays on your device
Run — free
Worked example
- Month
- 3
- Day
- 25
- Month name
- March
- Sign
- Aries
- Symbol
- ♈
- Element
- fire
People type a birth date and expect a clear Western tropical zodiac sign plus the date window that sign occupies on the civil calendar. This western zodiac sign calculator maps month and day to one of the twelve tropical signs using a fixed cusp table that matches the ranges printed on countless charts and profiles—Capricorn wrapping the year end, Aries opening at the spring equinox window in popular lists, and so on—then returns the English sign name, Unicode glyph, classical element and modality, and both a readable date range string and structured start and end month-day objects. Invalid combinations such as month thirteen or April thirty-first fail with invalid input and are not charged.
Birth month, day, and how tropical cusps are applied
Send two integers: month from one for January through twelve for December, and day as the day of that month. The engine first checks that the pair is a possible civil birth date under a simple table—thirty or thirty-one days for most months, and February allowing one through twenty-nine so leap-day birthdays are accepted without requiring a year.
It then places the date on a fixed Western tropical cusp table used for popular sign lists: for example March twenty-first through April nineteenth maps to Aries, April twentieth through May twentieth to Taurus, and so on through Sagittarius, with Capricorn spanning December twenty-second through January nineteenth across the year boundary. These ranges are the conventional fixed windows, not year-by-year astronomical ingress times; if you need precise solar longitude for a given year you want an ephemeris product, not this calculator.
What you can do with it
Profile and onboarding forms
Apps collect birth month and day, show the tropical sun sign and its date range immediately, and store the structured sign for filters and badges.
Education and attribute labels
Lesson tools display element and modality next to the sign so students learn classical groupings without maintaining their own cusp tables.
FAQ
What if I enter an invalid month or day?
Months outside 1–12 and days that cannot occur in that month (for example April 31) are rejected and not charged.
Is this tropical or sidereal zodiac?
Western tropical only, using a fixed popular cusp table. It does not compute sidereal, Vedic, or Chinese zodiac systems.
Is the western zodiac sign calculator free?
The browser tool runs free on your device.
Does birth year or birth time matter?
No. Only month and day are required for this sun-sign lookup. Year, time, and place are not used; February 29 is accepted as a valid day without a year.
Which sign covers the turn of the year?
Capricorn. It runs from December 22 through January 19, so a birthday in late December and one in mid-January share the same sign.
Related tools
For developers — API access
Everything on this page is available programmatically. This section is for teams who want to wire it into their own systems; everyone else can just use the tool above.
API endpoint
Prefer to automate it? One authenticated POST creates the task; the result comes back by webhook or a signed link. The same capability also runs here on the web, by email and from Telegram — and soon from our app too.
Call it from your stack
curl -X POST https://api.kit.forhosting.com/date/zodiac-sign \
-H "Authorization: Bearer $KIT_KEY" \
-H "Content-Type: application/json" \
-d '{"month":3,"day":25}'const res = await fetch("https://api.kit.forhosting.com/date/zodiac-sign", {
method: "POST",
headers: {
"Authorization": `Bearer ${process.env.KIT_KEY}`,
"Content-Type": "application/json"
},
body: JSON.stringify({
"month": 3,
"day": 25
})
});
const { task_id } = await res.json();import os, requests
res = requests.post(
"https://api.kit.forhosting.com/date/zodiac-sign",
headers={"Authorization": f"Bearer {os.environ['KIT_KEY']}"},
json={
"month": 3,
"day": 25
},
)
task_id = res.json()["task_id"]<?php
$res = file_get_contents("https://api.kit.forhosting.com/date/zodiac-sign", false, stream_context_create([
"http" => [
"method" => "POST",
"header" => "Authorization: Bearer " . getenv("KIT_KEY") . "\r\nContent-Type: application/json",
"content" => '{"month":3,"day":25}',
],
]));
$task = json_decode($res, true);body := bytes.NewBufferString(`{"month":3,"day":25}`)
req, _ := http.NewRequest("POST", "https://api.kit.forhosting.com/date/zodiac-sign", body)
req.Header.Set("Authorization", "Bearer "+os.Getenv("KIT_KEY"))
req.Header.Set("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)Example request
{
"month": 3,
"day": 25
}Example response
{
"task_id": "tsk_a1b2c3d4e5f6a1b2c3d4e5f6",
"type": "date.zodiac_sign",
"status": "queued",
"_links": {
"result": "/tasks/tsk_…/result"
}
}The API is asynchronous: the call returns a task_id immediately and the result arrives by webhook. Polling is capped at 1 req/s per task.
Pricing
Published price — no tokens, no invented credits. A failed task is never charged.
Errors
| HTTP | Code | Meaning |
|---|---|---|
401 | unauthorized | Missing or invalid API key. |
402 | insufficient_balance | Your balance doesn't cover the task price. |
404 | unknown_type | That task type doesn't exist. |
429 | rate_limited | Too many requests. Use the webhook instead of polling. |
Technical notes
The path is pure integer validation and comparison: no ephemeris download, no wall clock, and no timezone surprises, so the same birth month and day always produce the same JSON in tests and in production.
Birth month, day, and how tropical cusps are applied
Aliases m and mon for month and d and day_of_month for day are accepted when documented. Missing fields, non-integers, months outside one through twelve, and days that cannot occur in the given month—such as February thirtieth or November thirty-first—raise invalid_input with a message that names the problem so forms and APIs can correct the payload instead of inventing a sign.
Reading the sign, range, element, and structured bounds
The sign field is the English tropical name such as Gemini or Scorpio; symbol is the Unicode glyph for that sign; element is one of fire, earth, air, or water; and modality is cardinal, fixed, or mutable—labels many UIs show next to a sun sign without a second lookup table. On success the response echoes the normalized month and day plus month_name in English for display. The date_range string joins the inclusive start and end in a single human line such as June twenty-one en dash July twenty-two, while range_start and range_end repeat the same bounds as objects with month, day, and month_name for tables and localization layers that format dates themselves. Use sign alone for a profile badge; combine date_range with symbol for share cards; use element and modality when teaching classical attributes.
API usage, pricing, product workflows, and limits
Call the free in-browser western zodiac sign calculator for quizzes, onboarding previews, and classroom demos without installing astrology libraries. Keep expectations honest: this product does not compute rising signs, houses, Chinese animals, or sidereal placements, and cusp enthusiasts who care about exact solar ingress for a specific year should treat the fixed table as the popular convention, not an astronomical certificate. Source inputs follow the same retention rules as other KIT parse items. Send a JSON body with required integer fields month and day. Use the prepaid API when a dating app, event platform, content site, or identity form needs a stable contract under KIT balance at $0.002 per successful item; validation failures never consume balance after the engine rejects the request. Pair this endpoint with calendar length tools when you first validate full dates, or with profile stores when you only need to persist the resulting sign string. Authors shipping SDKs can map sign, symbol, and date_range straight into UI chips and show element and modality in an expandable details row from the same response without extra client tables.
Integration use cases
Quizzes and content sites
Editorial and entertainment sites run a free western zodiac sign calculator widget and reuse the same JSON via API for server-rendered pages.
Technical questions
How do I find my Western zodiac sign from a birth date?
Send JSON with month (1–12) and day. The response includes sign, symbol, date_range, and structured range_start and range_end for the tropical sign.