import type { DateTime } from '../typings';
export type CompareStringsOptions = {
    ignoreCase?: boolean;
};
export declare function floorMod(x: number, n: number): number;
export declare function isLeapYear(year: number): boolean;
export declare function daysInYear(year: number): 366 | 365;
export declare function daysInMonth(year: number, month: number): number;
export interface DateObject {
    year: number;
    month: number;
    date: number;
    hour: number;
    minute: number;
    second: number;
    millisecond: number;
}
export declare function tsToObject(ts: number, offset: number): DateObject;
export declare function objToTS(obj: DateObject): number;
export declare function normalizeDurationUnit(component: string): "years" | "months" | "days" | "hours" | "minutes" | "seconds" | "milliseconds" | "quarters" | "weeks";
export declare function normalizeComponent(component: string): "year" | "month" | "day" | "hour" | "minute" | "second" | "millisecond" | "quarter" | "date" | "weekNumber" | "isoWeekNumber" | "isoWeekday" | "weekday" | "dayOfYear" | "weekYear" | "isoWeekYear";
export declare function normalizeDateComponents<From extends string, To extends string>(components: Partial<Record<From, string | number | undefined>>, normalizer: (unit: string) => To): Partial<Record<To, number>>;
export declare function offsetFromString(value: string | undefined): number | null;
export declare function computeOrdinal({ year, month, date }: {
    year: number;
    month: number;
    date: number;
}): number;
export declare function uncomputeOrdinal({ year, ordinal }: {
    year: number;
    ordinal: number;
}): {
    month: number;
    date: number;
};
export declare function gregorianToOrdinal(gregData: {
    year: number;
    month: number;
    date: number;
}): {
    year: number;
    ordinal: number;
};
export declare function isoWeekdayToLocal(isoWeekday: number, startOfWeek: number): number;
export declare function gregorianToWeek(dateObj: DateObject, minDaysInFirstWeek: number, startOfWeek: number): {
    day: number;
    weekYear: number;
    weekNumber: number;
    weekday: number;
    isoWeekYear: number;
    isoWeekNumber: number;
    isoWeekday: number;
};
export declare function weeksInWeekYear(weekYear: number, minDaysInFirstWeek?: number, startOfWeek?: number): number;
export declare function weekToGregorian(weekData: {
    weekYear: number;
    weekNumber: number;
    weekday: number;
}, minDaysInFirstWeek: number, startOfWeek: number): {
    year: number;
    month: number;
    date: number;
};
export declare function monthDiff(a: DateTime, b: DateTime): number;