如何将时间戳以毫秒为单位转换为时间？

import datetime

timestamp = 1633029810000
dt = datetime.datetime.fromtimestamp(timestamp / 1000)
print(dt)

const timestamp = 1633029810000;
const date = new Date(timestamp);
console.log(date);

import java.time.Instant;

public class Main {
    public static void main(String[] args) {
        long timestamp = 1633029810000L;
        Instant instant = Instant.ofEpochMilli(timestamp);
        System.out.println(instant);
    }
}

$timestamp = 1633029810000;
$date = date('Y-m-d H:i:s', $timestamp / 1000);
echo $date;