JavaScript Date Get and Set Methods

Date get methods

To get information from a date object, the get method is required.

let assume const d = new Date().

See the table below:

Method	Description	Example
`getFullYear`	Get full year (yyyy)	`d.getFullYear()`
`getMonth`	Get month (0 - 11)	`d.getMonth()`
`getDate`	Get date (1 - 31)	`d.getDate()`
`getHours`	Get hours (0 - 23)	`d.getHours()`
`getMinutes`	Get minutes (0 - 59)	`d.getMinutes()`
`getSeconds`	Get seconds (0 - 59)	`d.getSeconds()`
`getMilliseconds`	Get milliseconds (0 - 999)	`d.getMilliseconds()`
`getTime`	Get time (>= 1613560292960)	`d.getTime()`
`getDay`	Get day (0-6)	`d.getDay()`
`Date.now`	Get current year day in milliseconds (0-6)	`Date.now()`

getMonth(): 0 is January and 11 is February.

getDay(): 0 is Sunday and 6 is Saturday.

The table may also include the Universal Time Coordinated (UTC) date. For example d.getUTCDay().

See the examples below:

const d = new Date();
const months = [
  "Jan", "Feb", "March", "April", "May", "June", 
  "July", "Aug", "Sep", "Oct", "Nov", "Dec"
  ];

months[d.getMonth()];

See another example below:

const d = new Date();
const days = ["Sun", "Mon", "Tues", "Thur", "Fri", "Sat"];

days[d.getDay()];

Parse

The parse method allows you to parse a data string format to get the timestamp in milliseconds from 1 January 1970 till the time specified in the string format.

The syntax is shown below:

Date.parse(str)

See the example below:

const parseTime = Date.parse('2055-01-22T10:48:13.201-06:00');

console.log(parseTime); // 2684249293201

Date set methods

To set information from a date object, the set method is required.

let assume const d = new Date().

See the table below:

Method	Description	Example
`setFullYear`	Set full year (yyyy)	`d.setFullYear(...)`
`setMonth`	Set month (0 - 11)	`d.setMonth(...)`
`setDate`	Set date (1 - 31)	`d.setDate(...)`
`setHours`	Set hours (0 - 23)	`d.setHours(...)`
`setMinutes`	Set minutes (0 - 59)	`d.setMinutes(...)`
`setSeconds`	Set seconds (0 - 59)	`d.setSeconds(...)`
`setMilliseconds`	Set milliseconds (0 - 999)	`d.setMilliseconds(...)`
`setTime`	Set time (>= 1613560292960)	`d.setTime(...)`
`setDay`	Set day (0-6)	`d.setDay(...)`

The table may also include the Universal Time Coordinated (UTC) date. For example d.setUTCDay().

See the examples below:

const d = new Date();
d.setFullYear(2069);
d; // 2069-mm-ddThrs:mins:secs.msecsZ

It is optional to include Month and day.

const d = new Date();
d.setFullYear(2069, 03, 20);
d; // 2069-04-20Thrs:mins:secs.msecsZ

Mixed set and get methods

It is possible to use both methods together.

See the example below:

const d = new Date();
d.setDate(d.getDate() + 30);
d;

The addition above is handled automatically by the Date object by shifting months or year.

Happy coding!!!