Date-related operations in JavaScript

This article translates the JavaScript Tutorial playlist of up master Kudvenkat on YouTube

SOURCE Address here:

https://www.youtube.com/watch?v=PMsVM7rjupU&list=PL6n9fhu94yhUA99nOsJkKXBqokT3MBK0b

Date () is used to make a date object in JavaScript constructor

The following example displays the current date and time on the page

document.write (new Date ());

If date () constructor is used without any parameters, the current date and time are returned. There are two ways to create a Date object that has a specified time and date:

1. Use a date string

var New Date ("January, 1980 11:20:00");d ocument.write (dateOfBirth);

2. use specific numbers to refer to the year, month, day, hour, minute, second, and millisecond . The format is as follows.

var New Date (year, month, day, hours, minutes, seconds, milliseconds);

Example:

var New Date (1980, 0, 0, 0);d ocument.write (dateOfBirth);

Note: In JavaScript, the number of months is starting from 0, so if you want to get March. Then you should use 2 instead of 3.

The above code will produce the following results on my computer because my computer is using the (UTC) Dublin,edinburgh,lisbon,london time zone

Sun Jan 1980 11:20:00 gmt+0000 (GMT Standard Time)

If you are using a different time zone on your computer, you may get a slightly more varied result. For example, if you are using the (utc+05:30) Chennai, Kolkata, Mumbai, and New Delhi time zone, the results will look like this

Sun Jan 1980 11:20:00 gmt+0530 (India Standard Time)

Some of the more practical methods of date objects

getFullYear ()

Returns the entire year (all 4 numbers will be displayed)

Example: The following example will return 1980

var New Date (1980, 0, 0, 0). getFullYear ();d ocument.write (year);

GetMonth ()

This method returns the number of months (from 0 to 11)

Example: The following example returns 0 (January)

var New Date (1980, 0, 0, 0). GetMonth ();d ocument.write (month);

You can also use the following code to get the month name according to the number of months, the following example will return January

function Getmonthnamefromnumber (monthnumber) {    var monthNames = ["January", "February", "March", "April" ,                        " May "," June "," July "," August "," September ",                         " October "," November "," December ";     return monthnames[monthnumber];} var monthName = Getmonthnamefromnumber (new Date (1980, 0, 0, 0). GetMonth ()); document.write (monthName);

GetDate ()

This method returns the days of the month (from 1 to 31)

Example: The following example returns 13

var New Date (1980, 0, 0, 0). GetDate ();d ocument.write (dayofmonth);

GetDay ()

Returns the number of days in a week (from 0 to 6), 0 for sunday,1 on behalf of Monday, and so on

Example: The following example will return 0

var New Date (1980, 0, 0, 0). GetDay ();d ocument.write (dayOfWeek);

You can use the following code to get the name of a specific day from the day's representative number, and the following code returns Sunday.

function Getweekdaynamefromnumber (daynumber) {    var weekdays = ["Sunday", "Monday", "Tuesday", "Wednesday "," Thursday "," Friday "," Saturday "];     return weekdays[daynumber];} var weekdayname = Getweekdaynamefromnumber (new Date (1980, 0, 0, 0). GetDay ());d ocument . write (weekdayname);

You can also use the following methods to get the part of the date object that gets the time

getHours () // return Hours (0-23) getminutes () // return minutes (0-59) getseconds () // return seconds (0-59) getmilliseconds () // returns milliseconds (0-999)

How do I convert a Date object to a dd/mm/yyyy format?

function formatdate (date) {    var day = date.getdate ();     if (Day [)     {        = ' 0 ' + day ;    }     var month = Date.getmonth () + 1;     if (Month [)     {        = "0" + month;    }     var year = date.getfullyear ();     return Day + "/" + month + "/" + year ;} document.write (formatdate(new Date ()));

If you don't want 0 of the month before the unit, then you can change the code as follows

function formatdate (date) {    var day = date.getdate ();     var month = Date.getmonth () + 1;     var year = date.getfullyear ();     return Day + "/" + month + "/" + year ;} document.write (formatdate(new Date ()));

Date-related operations in JavaScript