/**
 * Portable Moment-like date formatter subset.
 */
import { type PlainDateTime } from './types.js';
export declare function formatDateTime(value: PlainDateTime, format: string | undefined, localeName: string | undefined): string;
export declare function validateDateFormat(format: string): void;
/**
 * The minutes token of a format that has no other clock in it, or `undefined`.
 *
 * `mm` is minutes, while `%m` and a hand-written `yyyy-mm-dd` mean the month, so
 * the lowercase month is an easy habit to bring in. A format with minutes and
 * neither an hour nor a second beside them almost always means the month, and a
 * date drawn without a time then prints month `00` on every row while the run says
 * nothing. A clock part anywhere in the format, a named one included, means the
 * minutes were meant. Walked the way {@link validateDateFormat} walks, so a
 * bracketed literal is never read as a token.
 */
export declare function minutesWithoutClock(format: string): string | undefined;
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