import { ISODateString } from './types';
/** Parse an ISO date or datetime into a UTC-oriented `Date` object. */
export declare function parseDate(value: ISODateString): Date;
/** Format a `Date` as a `YYYY-MM-DD` ISO date string. */
export declare function toISODate(date: Date): ISODateString;
/** Add calendar days to an ISO date string. */
export declare function addDays(value: ISODateString, days: number): ISODateString;
/** Return the whole-day distance from `start` to `end`. */
export declare function diffDays(start: ISODateString, end: ISODateString): number;
/** Return the earliest ISO date from a non-empty date list. */
export declare function minDate(values: readonly ISODateString[]): ISODateString;
/** Return the latest ISO date from a non-empty date list. */
export declare function maxDate(values: readonly ISODateString[]): ISODateString;
/** Return the first day of the month containing `value`. */
export declare function startOfMonth(value: ISODateString): ISODateString;
/** Format a month header label for the timeline. */
export declare function formatMonth(value: ISODateString, locale?: string): string;
/** Format a day tick label for the timeline. */
export declare function formatDay(value: ISODateString, locale?: string): string;
/** Format a compact month label for coarse timeline ticks. */
export declare function formatShortMonth(value: ISODateString, locale?: string): string;
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