The dateToUnix() function below is meant to return a unix timestamp given a date as the parameter (in the form of "YYYY.MM.DD").

function dateToUnix(date) {
    return Math.floor(new Date(date).getTime() / 1000);
}

console.log(dateToUnix("2022.03.25")); // logs 1648180800 in Chrome

In Safari, the function returns NaN. How can I refactor my function so that it works in both browsers?