type DateUnits = 'milliseconds' | 'seconds' | 'minutes' | 'hours' | 'days' | 'months' | 'years';
/**
 * Performs date difference d1 - d2 in the specified unit.
 * @param d1 Date
 * @param d2 Date
 * @param unit string
 * @returns number
 */
export declare const dateDiff: (d1: any, d2: any, unit?: 'milliseconds' | 'seconds' | 'minutes' | 'hours' | 'days') => any;
/**
 * Returns -1 is d1 < d2, and 1 otherwise. Ideal for sorting by dates
 * @param d1 Date
 * @param d2 Date
 * @returns number
 */
export declare const compareDates: (d1: any, d2: any) => 1 | -1;
/**
 * Returns a new date with the specified amount of units added
 * @param date The target date
 * @param amount The amount to add
 * @param unit The unit of the determined amount to add
 * @returns
 */
export declare const dateAdd: (date: any, amount: number, unit: DateUnits) => number;
/**
 * Returns a new date with the specified amount of units subtracted
 * @param date The target date
 * @param amount The amount to subtract
 * @param unit The unit of the determined amount to subtract
 * @returns
 */
export declare const dateSubtract: (date: any, amount: number, unit: DateUnits) => number;
export {};
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