import { Locale } from 'date-fns';
declare function getDerivedTimeFromKeyboardEvent(prevValue: number | null, event: KeyboardEvent): number;
export interface DateItem {
    type: 'date';
    dateObject: {
        date: number;
        month: number;
        year: number;
    };
    inCurrentMonth: boolean;
    isCurrentDate: boolean;
    inSpan: boolean;
    startOfSpan: boolean;
    endOfSpan: boolean;
    selected: boolean;
    ts: number;
}
export interface MonthItem {
    type: 'month';
    dateObject: {
        month: number;
        year: number;
    };
    isCurrentMonth: boolean;
    selected: boolean;
    ts: number;
}
export interface YearItem {
    type: 'year';
    dateObject: {
        year: number;
    };
    isCurrentYear: boolean;
    selected: boolean;
    ts: number;
}
/**
 * Given time to display calendar, given the selected time, given current time,
 * return the date array of display time's month.
 */
declare function dateArray(monthTs: number, valueTs: number | [number, number] | null, currentTs: number, startDay: 0 | 1 | 2 | 3 | 4 | 5 | 6, strip?: boolean): DateItem[];
declare function monthArray(monthTs: number, valueTs: number | [number, number] | null, currentTs: number): MonthItem[];
declare function yearArray(yearTs: number, valueTs: number | [number, number] | null, currentTs: number): YearItem[];
declare function strictParse(string: string, pattern: string, backup: Date, option: {
    locale: Locale;
}): Date;
export { dateArray, monthArray, yearArray, strictParse, getDerivedTimeFromKeyboardEvent };