Business Date Parser

An opinionated, zero-dependency, fast user input parser for date & times. This module is designed to process & parse user input into a Javascript date object.

Date Format Examples

• c: Current Date
• y: Yesterday
• t: Tomorrow
• f: First day of the month
• l: Last day of the month
• +20: 20 days from now
• -20: 20 days ago
• 15: The 15th day of the current month
• 4/15: The 15th day of April of the current year
• 4/15/2020: April 15th, 2020
• 5-3-18: May 3rd, 2018
• 2025-03-01: March 1st, 2025

Time Format Examples

• c: Current Time
• +20: 20 minutes from now
• -20: 20 minutes ago
• 2: 2:00 PM
• 02: 2:00 AM
• 2a: 2:00 AM
• 2:45: 2:45 PM
• 2:45a: 2:45 AM
• 530: 5:30 PM
• 8:22:34.028: 8:22:34.028 AM

Date & Time format examples

• Date and time parsing splits based on the first space encountered.
• y 5p: Yesterday at 5:00PM
• l 8a: Last day of the month at 8:00AM
• 2025-03-01 8:22:34.028: March 1st, 2025 at 8:22:34.028 AM

Anything that does not match the rule-based parsing will fall back to Javascript's built-in Date.parse().

Installing

npm i @beauwest/business-date-parser

Getting Started

import {parseDate, parseTime, parseDateAndTime} from 'business-date-parser';

const theFifth = parseDate('5');

const threeDaysFromNow = parseDate('+3');

const quittingTime = parseTime('5');

const snackTime = parseTime('2:30p');

const snackTimeThreeDaysFromNow = parseTime('+3 2:30p');

// Will prefer time parsing when no date part is found in a dateAndTime string
const preferTime = parseDateAndTime('9a', {preferTime: true});

// Default to a specific date when preferring time parsing and there is no date part.
const preferTimeWithSpecificDate = parseDateAndTime('9a', {preferTime: true, defaultDate: '2025-03-01'});