export declare const months: string[];
export declare const days: string[];
export declare const isValidDate: (value: string | null | undefined) => boolean;
export declare const isValidTime: (value: string | null | undefined) => boolean;
export declare const isValidMinuteOrSecond: (value: string | null | undefined) => boolean;
export declare const isValidHour: (value: string | null | undefined) => boolean;