Convert between UTC offsets API

Converts a wall-clock datetime from one fixed UTC offset (in minutes) to another via UTC, with no IANA/tz-database dependency so the result is fully deterministic. Answers 'Convert 14:30 UTC-5 to UTC+1', 'What is this local time in another offset?'.

Price$0.04per request

MethodPOST

Route/v1/datetime/offset-convert

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

datetimetimezoneutc-offsetconvertoffsetwall-clockdeterministicscheduling

API URLhttps://x402.hexl.dev/v1/datetime/offset-convert

Integration docs

Example request

{
  "datetime": "2026-03-09T14:30:00",
  "fromOffsetMinutes": -300,
  "toOffsetMinutes": 60
}

Example response

{
  "inputLocal": "2026-03-09T14:30:00",
  "fromOffset": "-05:00",
  "toOffset": "+01:00",
  "utc": "2026-03-09T19:30:00.000Z",
  "convertedLocal": "2026-03-09T20:30:00+01:00",
  "convertedWeekday": "Monday",
  "offsetDeltaMinutes": 360,
  "interpretation": "2026-03-09T14:30:00 at -05:00 = 2026-03-09T19:30:00.000Z = 2026-03-09T20:30:00 at +01:00 (Monday)."
}

Input schema

{
  "type": "object",
  "required": [
    "datetime",
    "fromOffsetMinutes",
    "toOffsetMinutes"
  ],
  "properties": {
    "datetime": {
      "type": "string",
      "examples": [
        "2026-03-09T14:30:00"
      ]
    },
    "fromOffsetMinutes": {
      "type": "integer",
      "examples": [
        -300
      ]
    },
    "toOffsetMinutes": {
      "type": "integer",
      "examples": [
        60
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}