import dayjs from 'dayjs';
import { type DateConstantsTargetFormat, type DateToFormatOptions } from '../types';
export declare const getDatesRange: (start: Date, end: Date, interval: dayjs.UnitType) => Date[];
export declare const isValidDate: (date: Date) => boolean;
export declare const getConstantDatesAndFormattingOptions: (targetFormat: DateConstantsTargetFormat, isSundayFirstWeekDay: boolean, customStartDate?: Date, customEndDate?: Date, customInterval?: dayjs.UnitType) => {
    constantDates: Date[];
    defaultOptions: DateToFormatOptions;
};