export declare function firstDayOfMonth(date: Date): Date;
export declare function getSemiMonthlyForDate(date: Date): Date[];
export declare function getSemiMonthlyForMonth(date: Date): Date[];
export declare function getPaydays(type: "weekly" | "bi_weekly" | "semi_monthly" | "monthly", startOn: Date, numPaydays?: number, opts?: {
    monthly?: number;
}): Array<Date>;