/**
 * Converts `value` to `Date` or `undefined`.
 * @param dateOrDateString
 */
export declare const value2Date: (dateOrDateString: Date | string | number) => Date | undefined;
/**
 * Formats a given `Date` object as a date string.
 *
 * @param dateObject - The `Date` instance to format.
 * @param format - The output format: `"YYYYMMDD"` (default) or `"DDMMYYYY"`.
 *   - `"YYYYMMDD"` → returns `"YYYY-MM-DD"`
 *   - `"DDMMYYYY"` → returns `"DD-MM-YYYY"`
 * @returns The formatted date string with zero-padded day and month.
 */
export declare const date2DateString: (dateObject: Date, format?: "YYYYMMDD" | "DDMMYYYY") => string;