denoland-deno/std/datetime/README.md

datetime

Simple helper to help parse date strings into Date, with additional functions.

Usage

parseDate / parseDateTime

• parseDate() - Take an input string and a format to parse the date. Supported formats are exported in DateFormat.
• parseDateTime() - Take an input string and a format to parse the dateTime. Supported formats are exported in DateTimeFormat.

import { parseDate, parseDateTime } from 'https://deno.land/std/datetime/mod.ts'

parseDate("20-01-2019", "dd-mm-yyyy") // output : new Date(2019, 0, 20)
parseDate("2019-01-20", "yyyy-mm-dd") // output : new Date(2019, 0, 20)
...

parseDateTime("01-20-2019 16:34", "mm-dd-yyyy hh:mm") // output : new Date(2019, 0, 20, 16, 34)
parseDateTime("16:34 01-20-2019", "hh:mm mm-dd-yyyy") // output : new Date(2019, 0, 20, 16, 34)
...

dayOfYear / currentDayOfYear

• dayOfYear() - Returns the number of the day in the year.
• currentDayOfYear() - Returns the number of the current day in the year.

import {
  dayOfYear,
  currentDayOfYear,
} from "https://deno.land/std/datetime/mod.ts";

dayOfYear(new Date("2019-03-11T03:24:00")); // output: 70
currentDayOfYear(); // output: ** depends on when you run it :) **

weekOfYear

Returns the ISO week number of the provided date (1-53)

import { weekOfYear } from "https://deno.land/std/datetime/mod.ts";

weekOfYear(new Date("2020-12-28T03:24:00")); // Returns 53