/**
 * Get today's date in ISO 8601 format (YYYY-MM-DD)
 * Uses UTC to ensure consistency across timezones
 */
export declare function getTodayISO(): string;
/**
 * Get current timestamp in ISO 8601 format
 */
export declare function getCurrentTimestamp(): string;
/**
 * Check if a date string represents today
 * @param dateString ISO 8601 date string to check
 * @returns true if the date is today
 */
export declare function isToday(dateString: string): boolean;
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