import { Effect } from 'effect';
/**
 * Effect-based accessors for the current calendar date. Uses Effect's `Clock`
 * service under the hood, so tests can freeze time with `TestClock` and
 * production uses the real system clock.
 *
 * This is the **only** impurity boundary in the calendar module — every
 * other function in this module is referentially transparent.
 *
 * @example
 * ```ts
 * import { Calendar } from 'foldkit'
 * import { Effect } from 'effect'
 *
 * const program = Effect.gen(function* () {
 *   const today = yield* Calendar.today.local
 *   const nycToday = yield* Calendar.today.inZone('America/New_York')
 *   return { today, nycToday }
 * })
 * ```
 */
export declare const today: {
    /**
     * The current calendar date in the browser's local timezone.
     */
    local: Effect.Effect<import("effect/Schema").Struct.ReadonlySide<{
        readonly year: import("effect/Schema").Int;
        readonly month: import("effect/Schema").Int;
        readonly day: import("effect/Schema").Int;
    }, "Type">, never, never>;
    /**
     * The current calendar date in a specific IANA timezone
     * (e.g. `"America/New_York"`, `"Europe/London"`, `"Asia/Tokyo"`).
     */
    inZone: (timeZone: string) => Effect.Effect<import("effect/Schema").Struct.ReadonlySide<{
        readonly year: import("effect/Schema").Int;
        readonly month: import("effect/Schema").Int;
        readonly day: import("effect/Schema").Int;
    }, "Type">, never, never>;
};
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