JavaScript: Count the number of days passed since beginning of the year
JavaScript Datetime: Exercise-16 with Solution
Write a JavaScript function to count the number of days passed since the year began.
Test Data:
console.log(days_passed(new Date(2015, 0, 15)));
15
console.log(days_passed(new Date(2015, 11, 14)));
348
Sample Solution:-
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JavaScript function to count the number of days passed since beginning of the year</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function days_passed(dt) {
var current = new Date(dt.getTime());
var previous = new Date(dt.getFullYear(), 0, 1);
return Math.ceil((current - previous + 1) / 86400000);
}
console.log(days_passed(new Date(2015, 0, 15)));
console.log(days_passed(new Date(2015, 11, 14)));
Sample Output:
15 348
Flowchart:

Live Demo:
See the Pen JavaScript - Count the number of days passed since beginning of the year-date-ex- 16 by w3resource (@w3resource) on CodePen.
Improve this sample solution and post your code through Disqus
Previous: Write a JavaScript function to get the quarter (1 to 4) of the year.
Next: Write a JavaScript function to convert a Unix timestamp to time.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
- Weekly Trends
- Python Interview Questions and Answers: Comprehensive Guide
- Scala Exercises, Practice, Solution
- Kotlin Exercises practice with solution
- MongoDB Exercises, Practice, Solution
- SQL Exercises, Practice, Solution - JOINS
- Java Basic Programming Exercises
- SQL Subqueries
- Adventureworks Database Exercises
- C# Sharp Basic Exercises
- SQL COUNT() with distinct
- JavaScript String Exercises
- JavaScript HTML Form Validation
- Java Collection Exercises
- SQL COUNT() function
- SQL Inner Join