Date Formats and Set

Date Formats and Set

You can read and change the parts of a date.

Date input formats

const d = new Date("2023-03-14");       // ISO format
const d2 = new Date("March 14, 2023");  // long format

Set date parts

const d = new Date();
d.setFullYear(2024);
d.setMonth(5);   // June (month 5)
d.setDate(20);
d.setHours(10);
d.setMinutes(30);
d.setSeconds(0);

Full date construction

const d = new Date(2023, 2, 14, 9, 30, 0);
// March 14, 2023, 09:30:00

Set works in place

set methods modify the existing date object, so you do not assign the result.

Display formats

d.toISOString();
d.toLocaleDateString();
d.toLocaleTimeString();

TL;DR

• Dates can be created from ISO or long strings.
• setFullYear, setMonth, setDate change parts.
• get/set methods come in matching pairs.
• toLocaleDateString formats for the user.