export declare function zeroBefore(v: number, length: number): string;
/** Returns a string representation of a date-time according to pointed format
 * @param format 'yyyy-MM-dd hh:mm:ss.fff AZ'
 * @example
 * "yyyy-MM-dd hh:mm:ss.fff Z" => "2022-04-23 16:09:12.234" // point 'Z' at the end for UTCdate
 * "yyyy-MM-dd hh:mm:ss a" => "2022-04-23 04:09:12 pm" // point 'a' or 'A' at the end for 12hour format
 * "yyyy-MM-dd hh:mm:ss.fff aZ" => "2022-04-23 04:09:12 pm" // point 'Z' at the end for UTCdate
 * "yyyy-MM-dd hh:mm:ss" => "2022-04-23 16:09:12"
 * "yy-M-d h:m:s" => "22-4-23 13:9:12"
 * "dd/MM/yyyy" => "23/04/2022"
 * "MMM d, hh:mm A" => "Apr 23, 04:09 PM" (depends on localeInfo.namesMonthShort)
 * @tutorial Troubleshooting
 * * AM PM in the middle isn't supported (only at the end): use  'hh:mm, d/m/yyyy A' instead 'hh:mm A, d/m/yyyy'
 */
export default function dateToString(v: Date, format: string): string;