import { DateTime } from 'luxon';
export declare const invalidDate: Date;
export declare const isInvalidDate: (d: Date | undefined) => boolean;
export declare const isValidDate: (date: Date) => boolean;
export interface DateObj {
    dateTime: DateTime | undefined;
    timezone: string;
    isValid: boolean;
    invalidReason?: string;
    toISO?: () => string;
    toJSDate?: () => Date;
    isEqualDate?: (obj: DateObj) => boolean;
    isEqual?: (obj: DateObj) => boolean;
}
interface ToDateObj {
    date: Date | DateTime | string | undefined;
    tz?: string;
    isValid?: boolean;
    invalidReason?: string;
}
export declare const toDateObj: ({ date, tz, isValid, invalidReason, ...rest }: ToDateObj) => DateObj;
export declare const toDateTime: (value: Date | DateTime | string | undefined, tz?: string) => DateTime | null;
export declare const toFormat: (date: any, format?: string) => any;
export declare const toTimeZone: (date: Date, tz?: string, opts?: any) => Date;
export declare const fromTimeZone: (date: Date, tz: string) => Date;
export declare const compareObj: (value?: Date | string) => string | number;
export {};