export declare function clampDayToMonth(year: number, month1: number, day: number): number;
export declare function generateMonthlyDueDates(start: Date, end: Date, dueDay: number): Date[];
export declare function generateQuarterlyDueDates(start: Date, _end: Date, dueDay: number): Date[];
export declare function yearForMonthInAY(start: Date, month1: number): number;
export declare function buildQuarterLabels(startMonth1: number): string[];
