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@burglekitt/gmt

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

github.com/burglekitt/gmt

burglekitt/gmt

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/** * Return the week number for a given ISO 8601 datetime string. * * - By default uses ISO weeks (Monday-based). * - Returns null for invalid input. * * @param value ISO 8601 datetime string * @param optionsArg optional: weekStartsOn ("monday" | "sunday") for week calculations * @returns Week number (1-53) or null on invalid input * * @example parseWeekFromDateTime("2024-01-01T12:00:00") // 1 * @example parseWeekFromDateTime("2024-01-08T00:00:00") // 2 * @example parseWeekFromDateTime("2024-01-01T00:00:00", { weekStartsOn: "sunday" }) // 1 * @example parseWeekFromDateTime("invalid") // null */ export declare function parseWeekFromDateTime(value: string, optionsArg?: { weekStartsOn?: "monday" | "sunday"; }): number | null;