Get the timezone from latitude and longitude (coordinates to IANA time zone)

Short answer: pass the coordinates to a time zone API. GET /v1/timezone?lat=35.6762&lon=139.6503 returns Asia/Tokyo, the current offset (540 minutes) and whether daylight saving time is in effect.

curl "https://api.timelogicapi.com/v1/timezone?lat=35.6762&lon=139.6503&api_key=$TIMELOGIC_API_KEY"

{
  "unix": 1793377373,
  "unix_ms": 1793377373293,
  "utc": "2026-10-30T16:22:53Z",
  "iso_local": "2026-10-31T01:22:53+09:00",
  "rfc2822": "Sat, 31 Oct 2026 01:22:53 +0900",
  "human": "October 31, 2026, 1:22 AM Asia/Tokyo",
  "day_number": 7,
  "day_short": "Sat",
  "day_full": "Saturday",
  "timezone": "Asia/Tokyo",
  "offset": 540,
  "dst": false
}

A real response from October 30, 2026. Sydney (lat=-33.8688&lon=151.2093) returned Australia/Sydney with offset: 660 and dst: true in the same minute.

Why not compute the zone from longitude?

Time zones are political borders, not 15-degree stripes. Two points at the same longitude can be hours apart, a country can shift its offset by law, and daylight saving rules differ by region. A lookup against current boundary and tz data gives the canonical IANA name, which is also what you should store.

JavaScript: coordinates to time zone

async function timezoneAt(lat, lon) {
  const url = new URL("https://api.timelogicapi.com/v1/timezone");
  url.search = new URLSearchParams({ lat, lon });
  const res = await fetch(url, { headers: { "X-API-Key": process.env.TIMELOGIC_API_KEY } });
  if (!res.ok) throw new Error(`TimeLogic API ${res.status}`);
  const { timezone, offset, dst } = await res.json();
  return { timezone, offset, dst };
}

console.log(await timezoneAt(48.8566, 2.3522)); // { timezone: "Europe/Paris", ... }

Python: latitude and longitude to time zone

import os, requests

def timezone_at(lat: float, lon: float) -> str:
    r = requests.get(
        "https://api.timelogicapi.com/v1/timezone",
        params={"lat": lat, "lon": lon},
        headers={"X-API-Key": os.environ["TIMELOGIC_API_KEY"]},
        timeout=5,
    )
    r.raise_for_status()
    return r.json()["timezone"]

print(timezone_at(-33.8688, 151.2093))  # Australia/Sydney

The local time at a GPS position

Skip the second step: GET /v1/time/current?lat=40.7128&lon=-74.006 returns the current local time at that point (America/New_York) with Unix time, UTC, ISO 8601 and RFC 2822. Add format= with a strftime pattern for your own layout; see the current time reference.

Errors to handle

• Only one of lat/lon: 400 INVALID_PARAMETER, "Both 'lat' and 'lon' must be provided together."
• Out-of-range values (for example lat=95): 400 INVALID_PARAMETER, "Invalid coordinates."
• Mixing coordinates with tz or ip in one request: 400 AMBIGUOUS_TARGET.

Related guides

• Time zone API guide (pillar): every selector, including names, IPs, coordinates and offsets
• Get the timezone from an IP address
• Time API comparison: how TimeLogic compares with other coordinate lookups
• Resolve timezone reference