/**
 * Open Day One On This Day view for the current day.
 *
 * @returns Day One On This Day URL.
 * @example
 * openOnThisDay()
 * // => 'dayone://thisday'
 * @link https://dayoneapp.com/guides/tips-and-tutorials/day-one-url-scheme/
 */
export declare function openOnThisDay(): string;