export type TimeStr = string;
export declare const isValidTimeStr: (timeStr: TimeStr) => boolean;
interface ParsedTimeStr {
    hourStr: string;
    hours: number;
    minuteStr: string;
    minutes: number;
    secondStr: string;
    seconds: number;
    meridiem: 'AM' | 'PM';
}
export declare const formatTimePart: (part: number) => string;
export declare const parseTimeStr: (timeStr: TimeStr) => ParsedTimeStr;
export declare const compareTimeStr: (a: TimeStr, b: TimeStr) => number;
export declare const hoursAs12hClock: (hour: number) => number;
export {};