/**
 * Timezone Utility
 *
 * A versatile timezone management package designed for CommonJS, ES Module (ESM), JavaScript, and TypeScript projects.
 * It offers a range of features, including timezone listing, retrieving labels and values, region-based filtering, and converting between UTC and other timezones.
 * @packageDocumentation
 */
interface TimeZoneEntry {
    label: string;
    value: string;
    country: string;
    phoneCode: string;
    utcOffset: string;
}
interface ConvertOptions {
    is24Hour?: boolean;
    dateSeparator?: string;
    timeSeparator?: string;
}
type TimeZoneNames = TimeZoneEntry["value"];
/**
 * TimeZone class providing static methods for time zone operations.
 */
declare class TimeZone {
    static readonly timezones: TimeZoneEntry[];
    static readonly regions: string[];
    private static timezoneCache;
    /**
     * Checks if a given string is a valid ISO date-time format.
     * @param dateTime - The date-time string to validate.
     * @returns True if the string is a valid ISO date-time, false otherwise.
     */
    static isISODateTime(dateTime: string): boolean;
    /**
     * Validates if a given string is a valid time zone.
     * @param timeZone - The time zone string to validate.
     * @returns True if the time zone is valid, false otherwise.
     */
    static isValidTimeZone(timeZone: string): boolean;
    /**
     * Converts a date-time from one time zone to another.
     * @param dateTime - The date-time to convert (Date object or ISO string).
     * @param sourceTimeZone - The source time zone.
     * @param targetTimeZone - The target time zone.
     * @param is24Hour - Whether to use 24-hour format (default: false).
     * @returns Converted date-time string or Error if conversion fails.
     */
    static convertDateTime(dateTime: Date | string, sourceTimeZone: TimeZoneNames, targetTimeZone: TimeZoneNames, is24Hour?: boolean): string | Error;
    /**
     * Returns a list of all available time zones.
     * @returns Array of TimeZoneEntry objects.
     */
    static list(): TimeZoneEntry[];
    /**
     * Returns a list of all time zone values.
     * @returns Array of time zone values.
     */
    static listWithOnlyValue(): TimeZoneNames[];
    /**
     * Returns a list of all time zone labels.
     * @returns Array of time zone labels.
     */
    static listWithOnlyLabel(): string[];
    /**
     * Lists time zones for a specific region.
     * @param region - The region to filter time zones.
     * @returns Array of TimeZoneEntry objects for the specified region.
     */
    static listByRegion(region: string): TimeZoneEntry[];
    /**
     * Lists time zones for a specific country.
     * @param country - The country to filter time zones.
     * @returns Array of TimeZoneEntry objects for the specified country.
     */
    static listByCountry(country: string): TimeZoneEntry[];
    /**
     * Gets the details for a given time zone value.
     * @param value - The time zone value.
     * @returns The corresponding details or null if not found.
     */
    static getDetailsUsingTimeZoneValue(value: TimeZoneNames): TimeZoneEntry | null;
    /**
     * Returns a list of all available regions.
     * @returns Array of region strings.
     */
    static getRegions(): string[];
    /**
     * Converts a UTC date to a specified time zone.
     * @param utcDate - The UTC date (Date object or ISO string).
     * @param targetTimeZone - The target time zone.
     * @param options - Conversion options (optional).
     * @returns Formatted date-time string in the target time zone or error message.
     */
    static convertUTCToTimeZone(utcDate: Date | string, targetTimeZone: TimeZoneNames, options?: ConvertOptions): string | null;
    /**
     * Converts a date-time from a specified time zone to UTC.
     * @param dateTime - The date-time to convert (Date object or ISO string).
     * @param sourceTimeZone - The source time zone.
     * @param options - Conversion options (optional).
     * @returns Formatted UTC date-time string or error message.
     */
    static convertToUTC(dateTime: Date | string, sourceTimeZone: TimeZoneNames, options?: ConvertOptions): string | Error;
    /**
     * Converts a date-time between two specified time zones.
     * @param date - The date-time string to convert.
     * @param fromTimeZone - The source time zone.
     * @param toTimeZone - The target time zone.
     * @param options - Conversion options (optional).
     * @returns Formatted date-time string in the target time zone or error message.
     */
    static convertBetweenTimeZones(date: string, fromTimeZone: TimeZoneNames, toTimeZone: TimeZoneNames, options?: ConvertOptions): string | null;
    /**
     * Gets the current time in a specified time zone.
     * @param targetTimeZone - The target time zone.
     * @param options - Formatting options (optional).
     * @returns Formatted current date-time string in the target time zone or error message.
     */
    static getCurrentTimeInTimeZone(targetTimeZone: TimeZoneNames, options?: ConvertOptions): string | null;
    /**
     * Calculates the time difference between two time zones for a given date.
     * @param date - The date string to use for calculation.
     * @param fromTimeZone - The source time zone.
     * @param toTimeZone - The target time zone.
     * @returns Formatted time difference string or error message.
     */
    static getTimeDifferenceBetweenTimeZones(date: string, fromTimeZone: TimeZoneNames, toTimeZone: TimeZoneNames): string | null;
    /**
     * Converts a formatted date-time string to ISO format.
     * @param dateTimeString - The date-time string to convert.
     * @returns ISO formatted date-time string or null if conversion fails.
     */
    static convertToISO(dateTimeString: string): string | null;
}
export { TimeZone };
export default TimeZone;