import type { Temporal } from "../types.js";
/**
 * Returns the start of a year for the given datetime
 * @param dt datetime object which includes date info
 * @returns Temporal object which represents the start of a year
 */
export declare function startOfYear<DateTime extends Temporal.PlainDate | Temporal.PlainDateTime | Temporal.PlainYearMonth | Temporal.ZonedDateTime>(dt: DateTime): DateTime;
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