exiftool-vendored
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    Function isUTC

    • Check if a timezone value represents UTC.

      Handles multiple UTC representations including Zone instances, strings, and numeric offsets. Recognizes common UTC aliases like "GMT", "Z", "Zulu", "+0", "+00:00", etc.

      Parameters

      • zone: unknown

        Timezone to check (Zone, string, or number)

      Returns boolean

      true if the zone represents UTC/GMT/Zulu

      isUTC("UTC")              // true
      isUTC("GMT")              // true
      isUTC("Z")                // true
      isUTC("Zulu")             // true
      isUTC(0)                  // true
      isUTC("+00:00")           // true
      isUTC("UTC+0")            // true
      isUTC("America/New_York") // false
      isUTC("+08:00")           // false

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