/** An object with an hour and minute. */
export type Time = {
    hour: number;
    minute: number;
};
/**
 * Returns a local time for a timetable block starting time, based on an input
 * string. Several formats are accepted, e.g. 24-hour strings, 12-hour strings,
 * and strings excluding the minutes value. Returns null if the string is not
 * an understood format.
 * @param input The input string.
 */
export declare function tryParseUserTimeString(input: string): Time | null;
/**
 * Returns the given 12-hour formatted hour as a 24-hour formatted hour. Can
 * only be expected to return sensible results if the hour passed is an integer
 * between 1 and 12 (inclusive).
 * @param hour The 12-hour formatted hour.
 * @param half The half of the day (either "am" or "pm").
 */
export declare function hour12To24(hour: number, half: "am" | "pm"): number;
/**
 * Returns the given 24-hour formatted hour as a 12-hour formatted hour. Can
 * only be expected to return sensible results if the hour passed is an integer
 * between 0 and 23 (inclusive).
 * @param hour The 24-hour formatted hour.
 */
export declare function hour24To12(hour: number): {
    hour: number;
    half: "am" | "pm";
};