JavaScript Date Functions and Properties: Constructor

Date constructor is a basic function for creating date objects in JavaScript. With its help we can create a new date object in several different ways: current date and time, specific date, from timestamp or from a date string. Let's look at different ways of using the constructor below.

EXAMPLE

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>JavaScript getDate()</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    
    <style>
        .result {
            border: 1px solid #ddd;
            padding: 15px;
            margin: 10px 0;
            border-radius: 4px;
        }
    </style>
</head>
<body>
    <h3>Examples of using Date constructor:</h3>
    <div id="result" class="result"></div>

    <script>
    // Function for nice date formatting
    function formatDate(date) {
        return date.getDate() + "." + (date.getMonth() + 1) + "." + date.getFullYear() + 
               " " + date.getHours() + ":" + date.getMinutes() + ":" + date.getSeconds();
    }

    let output = "";
    
    // 1. Current date and time
    let currentDate = new Date();
    output += "Current date and time: " + formatDate(currentDate) + "<br><br>";
    
    // 2. Specific date (year, month, day)
    let specificDate = new Date(2025, 7, 3); // 3.8.2025
    output += "Specific date: " + formatDate(specificDate) + "<br><br>";
    
    // 3. From timestamp (milliseconds since 1.1.1970)
    let timestamp = new Date(1628011200000); // 3.8.2021
    output += "From timestamp: " + formatDate(timestamp) + "<br><br>";
    
    // 4. From date string
    let fromString = new Date("2025-08-03T12:30:00");
    output += "From date string: " + formatDate(fromString) + "<br><br>";
    
    // 5. Specific date and time
    let dateAndTime = new Date(2025, 7, 3, 12, 30, 0);
    output += "Specific date and time: " + formatDate(dateAndTime);
    
    document.getElementById("result").innerHTML = output;
    </script>
</body>
</html>

RESULT