export declare const wrapDate: (union?: string) => (num: number) => string;
export declare const START_YEAR = 1900;
export declare const END_YEAR = 2099;
export declare const years: string[];
export declare const months: string[];
export declare const daysInMonthLength: (year: number, month: number) => 30 | 28 | 29 | 31;
export declare const daysInMonth: (year: number, month: number) => string[];