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 *  Copyright 2025 Adobe
 *  All Rights Reserved.
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 * NOTICE:  Adobe permits you to use, modify, and distribute this
 * file in accordance with the terms of the Adobe license agreement
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/**
 * Gets the user's timezone with fallback to UTC if detection fails
 * @returns The user's timezone string (e.g., 'America/New_York') or 'UTC' as fallback
 */
export declare function getUserTimezone(): string;
/**
 * Checks if a date string is a valid date
 * @param dateString - The date string to check
 * @returns True if the date string is a valid date, false otherwise
 */
export declare function isValidDate(dateString: string): boolean;
/**
 * Formats a date string to locale date string, returning "–" for invalid dates
 * @param dateString - The date string to format
 * @returns Formatted date string or "–" for invalid dates
 */
export declare function formattedDate(dateString: string, type?: 'short' | 'long'): string;