JavaScript Set Date Methods
Set Date methods let you set date values (years, months, days, hours, minutes, seconds, milliseconds) for a Date Object.
Set Date Methods
Set Date methods are used for setting a part of a date:
| Method | Description |
|---|---|
| setDate() | Set the day as a number (1-31) |
| setFullYear() | Set the year (yyyy) |
| setHours() | Set the hour (0-23) |
| setMilliseconds() | Set the milliseconds (0-999) |
| setMinutes() | Set the minutes (0-59) |
| setMonth() | Set the month (0-11) |
| setSeconds() | Set the seconds (0-59) |
| setTime() | Set the time (milliseconds since January 1, 1970) |
The setFullYear() Method
ThesetFullYear() method sets the year of a date object. In this example to 2020:
ThesetFullYear() method canoptionally set month and day:
The setMonth() Method
ThesetMonth() method sets the month of a date object (0-11):
The setDate() Method
ThesetDate() method sets the day of a date object (1-31):
ThesetDate() method can also be used toadd days to a date:
Note
If adding days shifts the month or year, the changes are handled automatically by the Date object.
The setHours() Method
ThesetHours() method sets the hours of a date object (0-23):
ThesetHours() method can also be used to set minutes andseconds.
The setMinutes() Method
ThesetMinutes() method sets the minutes of a date object (0-59):
The setSeconds() Method
ThesetSeconds() method sets the seconds of a date object (0-59):
Compare Dates
Dates can easily be compared.
The following example compares today's date with January 14, 2100:
Example
const today = new Date();
const someday = new Date();
someday.setFullYear(2100, 0, 14);
if (someday > today) {
text = "Today is before January 14, 2100.";
} else {
text = "Today is after January 14, 2100.";
}
Note
JavaScript counts months from 0 to 11. January is 0. December is 11.
