How to convert Datetime to Unix timestamp in QML

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    import QtQuick 2.0

    Rectangle {
        width: 200
        height: 100
    
        property string dateStr: "2021-03-18T09:17:43" // Date string
    
        Text {
            text: {
                var date = new Date(dateStr); // Create a Date object
                var unixTimestamp = Math.floor(date.getTime() / 1000); // Convert to seconds
                return "Unix Timestamp: " + unixTimestamp;
            }
            anchors.centerIn: parent
        }
    }

Output:

Unix Timestamp: 1616059063

Example only. There may be multiple ways to perform this operation.

Code Explanation

In this QML example, a Date object is created from a string representation of the date (2021-03-18T09:17:43).
The getTime() method returns the time in milliseconds since January 1, 1970, which is then divided by 1000 to convert it to seconds. The result is displayed as a Unix timestamp.

Convert Unix timestamp to Date in QML

Other useful QML date functions (JavaScript-like API)

Function	Description	Example
`new Date()`	Creates a new date object representing a specific date and time or the current date and time if no argument is provided.	`new Date(1514764800 * 1000)` returns Mon Jan 01 2018 00:00:00 GMT+0000
`getTime()`	Returns the number of milliseconds since January 1, 1970 for the given date.	`date.getTime()` returns 1531657845000 for 2018-07-15 12:30:45
`toLocaleString()`	Returns a string with a language-sensitive representation of the date.	`date.toLocaleString()` returns 1/1/2018, 12:00:00 AM
`toISOString()`	Converts a date object to an ISO 8601 string in UTC.	`date.toISOString()` returns 2018-01-01T00:00:00.000Z
`toUTCString()`	Converts a date to a string in UTC format.	`date.toUTCString()` returns Mon, 01 Jan 2018 00:00:00 GMT
`setFullYear()`	Sets the year for a date object.	`date.setFullYear(2020)` sets the year to 2020.
`getFullYear()`	Gets the year from a date object.	`date.getFullYear()` returns 2018.
`setMonth()`	Sets the month for a date object (0 for January).	`date.setMonth(0)` sets the month to January.
`getMonth()`	Gets the month from a date object (0 for January).	`date.getMonth()` returns 0 for January.
`getDate()`	Gets the day of the month from a date object.	`date.getDate()` returns 1.
`setHours()`	Sets the hours for a date object.	`date.setHours(12)` sets the hours to 12.
`getHours()`	Gets the hours from a date object.	`date.getHours()` returns 0 (for midnight).

Current Unix Timestamp SECONDS SINCE JAN 01 1970

Current UTC Time

2025-08-20