/**
 * Main timezone detection interface
 */
export interface TimezoneResult {
    timezone: string;
    isValid: boolean;
    wasNormalized: boolean;
    originalTimezone: string | null;
    detectionMethod: "intl" | "intl-locale" | "date-fns-tz" | "offset" | "fallback";
    offset: number;
    offsetString: string;
}
/**
 * Enhanced timezone detection function with multiple fallbacks
 * Returns detailed information about the detected timezone
 */
export declare const detectTimezone: () => TimezoneResult;
/**
 * Simple timezone getter - drop-in replacement for your original function
 * Returns just the timezone string
 */
export declare const getCurrentSystemTimezone: () => string;
/**
 * Gets timezone with validation - throws if invalid
 */
export declare const getValidatedTimezone: () => string;
/**
 * Checks if a given timezone string is valid
 */
export declare const isValidTimezone: (tz: string) => boolean;
/**
 * Gets the current UTC offset in minutes
 */
export declare const getCurrentUTCOffset: () => number;
/**
 * Gets a formatted offset string (e.g., "UTC+05:30")
 */
export declare const getFormattedOffset: () => string;