import { tzParseTimezone } from '../_lib/tzParseTimezone/index.js';
import { toDate } from '../toDate/index.js';

/**
 * @name toZonedTime
 * @category Time Zone Helpers
 * @summary Get a date/time representing local time in a given time zone from the UTC date
 *
 * @description
 * Returns a date instance with values representing the local time in the time zone
 * specified of the UTC time from the date provided. In other words, when the new date
 * is formatted it will show the equivalent hours in the target time zone regardless
 * of the current system time zone.
 *
 * @param date the date with the relevant UTC time
 * @param timeZone the time zone to get local time for, can be an offset or IANA time zone
 * @param options the object with options. See [Options]{@link https://date-fns.org/docs/Options}
 * @param {0|1|2} [options.additionalDigits=2] - passed to `toDate`. See [toDate]{@link https://date-fns.org/docs/toDate}
 *
 * @throws {TypeError} 2 arguments required
 * @throws {RangeError} `options.additionalDigits` must be 0, 1 or 2
 *
 * @example
 * // In June 10am UTC is 6am in New York (-04:00)
 * const result = toZonedTime('2014-06-25T10:00:00.000Z', 'America/New_York')
 * //=> Jun 25 2014 06:00:00
 */
function toZonedTime(date, timeZone, options) {
    date = toDate(date, options);
    const offsetMilliseconds = tzParseTimezone(timeZone, date, true);
    const d = new Date(date.getTime() - offsetMilliseconds);
    const resultDate = new Date(0);
    resultDate.setFullYear(d.getUTCFullYear(), d.getUTCMonth(), d.getUTCDate());
    resultDate.setHours(d.getUTCHours(), d.getUTCMinutes(), d.getUTCSeconds(), d.getUTCMilliseconds());
    return resultDate;
}

export { toZonedTime };
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