export declare function prevDate(date: Date, amount?: number): Date;
export declare function nextDate(date: Date, amount?: number): Date;
export declare function prevMonth(date: Date, amount?: number): Date;
export declare function nextMonth(date: Date, amount?: number): Date;
export declare function prevYear(date: Date, amount?: number): Date;
export declare function nextYear(date: Date, amount?: number): Date;
export declare function sortDate(dateList: Date[]): Date[];