Working with dates in javascript

Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2015/01/working-with-dates-in-javascript.html Healthy diet is very important both for the body and mind. If you like Aarvi Kitchen recipes, please support by sharing, subscribing and liking our YouTube channel. Hope you can help. https://www.youtube.com/channel/UC7sEwIXM_YfAMyonQCrGfWA/?sub_confirmation=1 To create date object in JavaScript use Date() constructor The following example writes the current Date and Time to the web page document.write(new Date()); If the Date() constructor is used without any arguments, it returns the current date and time. To create a date object with specific dates there are 2 ways. Creating a specific date object in JavaScript using a date string var dateOfBirth = new Date("January 13, 1980 11:20:00"); document.write(dateOfBirth); You can also create a specific date object using number for year, month, day, hours, minutes, seconds, & milliseconds. The syntax is shown below. var dateOfBirth = new Date(year, month, day, hours, minutes, seconds, milliseconds); Example : var dateOfBirth = new Date(1980, 0, 13, 11, 20, 0, 0); document.write(dateOfBirth); Please note : In JavaScript month numbers start from ZERO. So if you want the month of march then use 2 instead of 3. The above code produces the following output on my machine, because I have (UTC) Dublin, Edinburgh, Lisbon, London time zone selected on my machine Sun Jan 13 1980 11:20:00 GMT+0000 (GMT Standard Time) If you have a different time zone selected on your computer, you may get a slightly different result. For example if you have (UTC+05:30) Chennai, Kolkata, Mumbai, New Delhi time zone selected, the result will be as shown below Sun Jan 13 1980 11:20:00 GMT+0530 (India Standard Time) Some useful Date object methods in JavaScript getFullYear() - Returns the full year (all the four digits) Example : The following example returns 1980 var year = new Date(1980, 0, 13, 11, 20, 0, 0).getFullYear(); document.write(year); getMonth() - Returns the month number (from 0-11) Example : The following example returns 0 (for January) var month = new Date(1980, 0, 13, 11, 20, 0, 0).getMonth(); document.write(month); You can use the following code to get the month name from the month number in Javascript. The following example returns 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, 13, 11, 20, 0, 0).getMonth()); document.write(monthName); getDate() - Returns the day of the month (from 1-31) Example : The following example returns 13 var dayOfMonth = new Date(1980, 0, 13, 11, 20, 0, 0).getDate(); document.write(dayOfMonth); getDay() - Returns the day number of the week (from 0-6). 0 is sunday, 1 is monday and so on. Example : The following example returns 0 var dayOfWeek = new Date(1980, 0, 13, 11, 20, 0, 0).getDay(); document.write(dayOfWeek); You can use the following code to get the day of the week from the day number in Javascript. The following example returns Sunday. function getWeekDayNameFromNumber(dayNumber) { var weekDays = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]; return weekDays[dayNumber]; } var weekdayName = getWeekDayNameFromNumber(new Date(1980, 0, 13, 11, 20, 0, 0).getDay()); document.write(weekdayName); You also have the following methods that return the time parts of the date object getHours() - Returns the hour (from 0-23) getMinutes() - Returns the minutes (from 0-59) getSeconds() - Returns the seconds (from 0-59) getMilliseconds() - Returns the milliseconds (from 0-999) How to convert date in javascript to dd/mm/yyyy format function formatDate(date) { var day = date.getDate(); if (day [ 10) { day = "0" + day; } var month = date.getMonth() + 1; if (month [ 10) { month = "0" + month; } var year = date.getFullYear(); return day + "/" + month + "/" + year; } document.write(formatDate(new Date())); If you don't want ZERO (0) before a single digit month or day number, then modify the formatDate() function as shown below. 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()));