import { Field } from 'o1js';
export { UTCDateTime, ISO8601 };
type ISO8601 = string;
declare class UTCDateTime extends Field {
    constructor(ts: number);
    static fromString(isoString?: ISO8601): Field;
    static now(): Field;
    static fromField(f: Field): string;
    toPrettyDate(): string;
    toPrettyDateTime(): string;
}