None.

An integer, between 1 and 31, representing the day of the month for the given date according to local time. Returns NaN if the date is invalid.

The day variable has value 25, based on the value of the Date object xmas95.

const xmas95 = new Date("1995-12-25T23:15:30");
const day = xmas95.getDate();

console.log(day); // 25

• Date.prototype.getUTCDate()
• Date.prototype.getUTCDay()
• Date.prototype.setDate()