/**
 * Time utility for deterministic testing.
 * Provides a clean API for freezing, advancing, and restoring system time.
 * Built on top of Vitest's timer system.
 */
export declare class Time {
    /**
     * Freezes time at a specific date for the duration of the provided function.
     * Automatically restores real time even if the function throws an error.
     *
     * @example
     * await Time.frozen('2024-05-20', async () => {
     *   const now = new Date();
     *   expect(now.toISOString()).toContain('2024-05-20');
     * });
     */
    static frozen<T>(date: string | Date | number, fn: () => Promise<T> | T): Promise<T>;
    /**
     * Freezes system time.
     * Use this in beforeEach or for sequential time manipulation.
     * Remember to call Time.restore() in afterEach!
     */
    static freeze(date: string | Date | number): void;
    /**
     * Advances the frozen time by a specific amount of milliseconds.
     */
    static advance(ms: number): void;
    /**
     * Restores system time to reality.
     */
    static restore(): void;
}
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