import { LinearScale } from './linear-scale';
export type TimeUnit = 'second' | 'minute' | 'hour' | 'day' | 'week' | 'month' | 'year';
export declare function toTimestamp(value: unknown): number;
/** Time scale: domain in milliseconds, ticks at calendar boundaries. */
export declare class TimeScale extends LinearScale {
    /** Unit of the last tick generation — for the default label format. */
    tickUnit: TimeUnit;
    convert(value: number): number;
    nice(): void;
    ticks(count?: number): number[];
    /** Months/years step calendar-wise, not by a fixed number of ms. */
    private calendarTicks;
    /** Default label format for the current tickUnit. */
    formatTick(value: number): string;
}