/**
 * Resolves a component's optional calendar-date clock to an instant.
 *
 * A supplied value is always midnight UTC. Invalid values fall back to the wall
 * clock so a malformed host attribute cannot leave date UI holding an Invalid
 * Date. Callers that need a calendar label should use `today`, which keeps the
 * same UTC interpretation.
 */
export declare function now(value?: string): Date;
/** Resolves a component's optional clock to an ISO calendar date in UTC. */
export declare function today(value?: string): string;