export declare const formatDate: (date: Date | null) => string;
export declare const customCalendarStyle: (isSelected: boolean | null, isInRange: boolean | null, highlightColor: string, highlightRangeColor: string, color: string) => {
    backgroundColor: string;
    borderColor: string;
    color: string;
} | {
    borderColor: string;
    backgroundColor?: undefined;
    color?: undefined;
};
