/**
 * Open date payload definition.
 */
type OpenDate = {
    /**
     * The date to open (YYYY-MM-DD format).
     *
     * @example '2020-04-02'
     */
    date?: string;
    /**
     * The day to open for On This Day view (MM-DD format).
     *
     * @example '04-12'
     */
    day?: string;
};
/**
 * Open Day One to a specific date or On This Day view.
 *
 * @param payload Open date payload.
 * @returns Day One open date URL.
 * @example
 * openDate({ date: '2020-04-02' })
 * // => 'dayone://open?date=2020-04-02'
 * @example
 * openDate({ day: '04-12' })
 * // => 'dayone://open?day=04-12'
 * @link https://dayoneapp.com/guides/tips-and-tutorials/day-one-url-scheme/
 */
export declare function openDate(payload?: OpenDate): string;
export {};