/**
 * Extract the date portion from a UTC datetime string.
 *
 * - Uses Temporal.Instant.from to parse, converts to UTC date.
 * - Returns "" for invalid input.
 *
 * @param value ISO UTC datetime string (e.g., "2024-03-17T14:30:45Z")
 * @returns ISO date string (e.g., "2024-03-17") or "" on invalid input
 *
 * @example parseDateFromUtc("2024-03-17T14:30:45Z") // "2024-03-17"
 * @example parseDateFromUtc("invalid") // ""
 */
export declare function parseDateFromUtc(value: string): string;