Time Zone Converter API

Convert a wall-clock date and time in one IANA time zone to other zones, DST-aware, with offsets and day shifts.

POST /api/v1/tools/time-zone-converterMCP time_zone_converterTime & Date

Convert a date and time between any IANA time zones, with UTC offsets and daylight saving handled automatically. Compare several cities at once.

Input

Send these as a JSON object. Unknown fields are rejected.

dateTime: Local date and time in the source zone: "YYYY-MM-DDTHH:MM" or "YYYY-MM-DD HH:MM[:SS]", e.g. "2026-10-20T09:00". (string, up to 30 characters, required)
from: Source IANA time zone, e.g. America/New_York, or UTC. (string, up to 64 characters, required)
to: Comma-separated target IANA time zones (up to 24), e.g. "Europe/London,Asia/Tokyo". (string, up to 2000 characters, required)

Try it in the browser JSON Schema Get an API key

curl https://pithlab.com/api/v1/tools/time-zone-converter \n  -H "Authorization: Bearer $PITHLAB_KEY" \n  -H "Content-Type: application/json" \n  -d '{"dateTime":"2026-10-20T09:00","from":"America/New_York","to":"Europe/London,Asia/Tokyo"}'

Example response

{
  "ok": true,
  "result": {
    "utc": "2026-10-20T13:00:00.000Z",
    "source": {
      "zone": "America/New_York",
      "date": "2026-10-20",
      "time": "09:00",
      "weekday": "Tue",
      "offsetMinutes": -240,
      "offset": "UTC-04:00",
      "dayShift": 0,
      "text": "2026-10-20 09:00 America/New_York (UTC-04:00)"
    },
    "targets": [
      {
        "zone": "Europe/London",
        "date": "2026-10-20",
        "time": "14:00",
        "weekday": "Tue",
        "offsetMinutes": 60,
        "offset": "UTC+01:00",
        "dayShift": 0,
        "text": "2026-10-20 14:00 Europe/London (UTC+01:00)"
      },
      {
        "zone": "Asia/Tokyo",
        "date": "2026-10-20",
        "time": "22:00",
        "weekday": "Tue",
        "offsetMinutes": 540,
        "offset": "UTC+09:00",
        "dayShift": 0,
        "text": "2026-10-20 22:00 Asia/Tokyo (UTC+09:00)"
      }
    ],
    "adjustedForDst": false,
    "summary": "2026-10-20 14:00 Europe/London (UTC+01:00); 2026-10-20 22:00 Asia/Tokyo (UTC+09:00)"
  }
}