import { DateTime, Duration } from 'luxon';
export declare const DATE_FORMAT_PYTHON_NAIVE = "yyyy-LL-dd HH:mm:ss";
export declare const DATE_FORMAT_PYTHON_AWARE: string;
export declare const DATE_FORMATS: string[];
export declare const TIME_ZONE_SUPPORT: boolean;
export interface TryParseDateTimeOptions {
    timeZone?: string;
    baseDate?: string | DateTime;
}
export interface TryParseTimeOptions {
    timeZone?: string;
    baseDate: DateTime;
}
export declare class DateUtil {
    static readonly TIME_ZONE_SUPPORT: boolean;
    static readonly DATE_FORMAT_PYTHON_NAIVE = "yyyy-LL-dd HH:mm:ss";
    static readonly DATE_FORMAT_PYTHON_AWARE: string;
    static readonly DATE_FORMATS: string[];
    /**
     * Attempts to construct a full date time value from a full datetime or partial time value.
     *
     * @param input
     * @param timeZone - converts the resulting DateTime to the specified timeZone
     * @param baseDate - used as the date when the input includes only the time
     */
    static tryParseDateTime(input: string, { timeZone, baseDate }?: TryParseDateTimeOptions): DateTime;
    /**
     * Attempt to construct a DateTime using the input as time, and the date from the "originalValue".
     */
    static tryParseTime(input: string, { timeZone, baseDate }: TryParseTimeOptions): DateTime;
    /**
     * Formats the hours with a minimum of 1 decimal places, and a maximum of 2 decimal places.
     */
    static formatHours(hours: number): string;
    /**
     * Formats the hours with a minimum of 1 decimal places, and a maximum of 2 decimal places.
     * @param diff
     * @param abbreviatedLabels - Use "hrs" and "mins" instead of "hours" and "minutes"; defaults to `true`
     * @param prefixPositiveValues - Prefix values greater than zero with a "+" sign; defaults to `true`
     */
    static formatHoursDiff(diff: Duration, abbreviatedLabels?: boolean, prefixPositiveValues?: boolean): string;
    /**
     * Formats an informational message that the hours total includes time from changing to or from DST.
     */
    static formatDstChange(offsetChange: number): string;
    static invalidate(value: DateTime, reason: string, explanation: string): DateTime;
}