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@burglekitt/gmt

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Temporal-based date and time utilities with timezone support and polyfill integration

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/** * Return true when the provided string is a valid ISO 8601 UTC datetime. * * - Uses regex to check format before parsing. * - Rejects leap seconds (e.g., "2024-12-31T23:59:60Z"). * - Uses Temporal.Instant.from for validation. * - Requires a time component — date-only strings ("2024-01-01Z") are rejected. * * @param value input UTC datetime string (ISO 8601) * @returns boolean indicating whether the input is a valid UTC datetime * * @example isValidUtc("2024-03-17T14:30:45Z") // true * @example isValidUtc("2024-01-01Z") // falsedate-only not supported * @example isValidUtc("2024-12-31T23:59:60Z") // false * @example isValidUtc("invalid") // false */ export declare function isValidUtc(value: string): boolean;