export declare const colonless: (str: string) => string;
export declare const spaceless: (str: string) => string;
export declare const isInvalidDate: (d: Date | undefined) => boolean;
export declare const isValidDate: (date: Date) => boolean;
export declare const inputCaseName: (input: string) => string;
export declare const parseDigits: (input: string) => null | string[];
export declare const parseColon: (input: string, twentyFourHour?: boolean) => null | string[];
export declare const parsePhrase: (input: string) => null | string[];
export declare const isValidInput: (input: string) => boolean;