export type FormatDateKind = "auto" | "date" | "datetime" | "time" | "long" | "relative" | "calendar";
/** Infer display kind from raw value — ISO date, HH:mm, or instant. */
export declare function detectFormatDateKind(value: string | Date): Exclude<FormatDateKind, "auto">;
export declare function isDateOnlyString(value: string): boolean;