How to get the first day of the year in JavaScript ?
Given a date/year and the task is to get the first day of the year using JavaScript.
Approach 1:
- Use getFullYear() Method to get the year from given date.
- Use the new Date() function to create the new date object using year, month and day.
Example: This example uses the getFullYear() method to get the full year of the current day and then get the first day of that year.
html
<body> <h1 style="color:green;"> GeeksForGeeks </h1> <p id="GFG_UP"> </p> <button onClick="GFG_Fun()"> click here </button> <p id="GFG_DOWN"> </p> <script> var up = document.getElementById('GFG_UP'); var down = document.getElementById('GFG_DOWN'); var date = new Date(); up.innerHTML = "Today = "+ date; function GFG_Fun() { // Use Date(year, month, day) function down.innerHTML = new Date(date.getFullYear(), 0, 1); } </script> </body> |
Output:
Approach 2:
- Initialize the year to the variable (year = 2012).
- Use new Date() function to create the new date object using year, month and day.
Example: This example uses the year 2012 and then get the first day of that year.
html
<body> <h1 style="color:green;"> GeeksForGeeks </h1> <p id="GFG_UP"> </p> <button onClick="GFG_Fun()"> click here </button> <p id="GFG_DOWN"> </p> <script> var up = document.getElementById('GFG_UP'); var down = document.getElementById('GFG_DOWN'); // Declare year and initialize it var year = 2023; up.innerHTML = "Today's year = "+ year; function GFG_Fun() { // Use Date(year, month, day) function // to get the first day of year down.innerHTML = new Date(year, 0, 1); } </script> </body> |
Output:
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