import { type FormatDatetimeOptions } from "./format.js";
import { type FormatDateKind } from "./detect.js";
export type FormatDateOptions = FormatDatetimeOptions & {
    /** Output preset. Default `auto` detects ISO date / HH:mm / instant. */
    kind?: FormatDateKind;
    /** Treat `Date` as calendar pick (react-day-picker) — not an instant. */
    calendar?: boolean;
};
/**
 * **Single entry point** for all date/time display in GX apps.
 *
 * - Defaults: locale, timezone, timeFormat from AppProvider (`syncDatetimeContext`)
 * - Optional overrides: `{ timezone: "Asia/Tokyo" }` per call
 * - Auto-detect: `"2026-05-01"` → date, `"14:30"` → time, ISO instant → datetime
 * - International patterns: ISO 8601 date (`yyyy-MM-dd`) + ISO datetime (`yyyy-MM-dd HH:mm`)
 */
export declare function formatDate(value: string | Date | null | undefined, options?: FormatDateOptions): string;
/** True when value looks like a displayable date/time (string or valid Date). */
export declare function isFormatDateValue(value: unknown): value is string | Date;