import { Temporal } from '@js-temporal/polyfill-patched';
import { Month } from '../constants/months';
import { PickerOptions, SupportedCalendar } from '../types';
import { AnyPlainDate } from './plainDate';
export declare const isCustomCalendar: (calendar: string) => boolean;
export declare const padWithZeroes: (number: number, count?: number) => string;
type DayType = 'endOfMonth' | 'startOfMonth';
export declare const formatDate: (date: AnyPlainDate, dayType?: DayType, format?: string) => string;
export declare const capitalize: ([firstLetter, ...rest]: string, locale?: string) => string;
/**
 * Constructs a date value in `calendar` from that calendar's own year/month/day
 * fields (e.g. Nepali fields for 'nepali', or era/eraYear fields for
 * Ethiopic). Custom calendars never use the era/eraYear form, so it's safe
 * to read `fields.year` directly when a custom implementation exists.
 */
export declare const getPlainDateFromCalendarFields: (fields: Temporal.PlainDateLike, calendar: SupportedCalendar, options?: Temporal.AssignmentOptions) => AnyPlainDate;
/** Re-interprets an ISO year/month/day in `calendar` (e.g. converts "today, ISO" into "today, Nepali"). */
export declare const getPlainDateFromIso: (isoFields: {
    year: number;
    month: number;
    day: number;
}, calendar: SupportedCalendar) => AnyPlainDate;
export declare const extractAndValidateDateString: (date: string, options: PickerOptions & {
    minDateString?: string;
    maxDateString?: string;
    strictValidation?: boolean;
    format?: "YYYY-MM-DD" | "DD-MM-YYYY";
}) => Temporal.PlainDateLike;
export declare const getMonthsForCalendar: (calendarType: string) => Month[];
export {};