import { Distances, RenderTask, ViewMode } from "../types";
export declare const ganttDateRange: (tasks: readonly RenderTask[], distances: Distances, viewMode: ViewMode, preStepsCount: number) => [Date, Date, number];
export declare const getWeekNumberISO8601: (date: Date) => number;
export declare const getDaysInMonth: (month: number, year: number) => number;