SOURCE

/**
 * 生成指定范围日期的随机日期
 * @params {Date} startDate
 * @params {Date} endDate
 */
function randomDate(startDate,endDate){
    let date = new Date(+startDate + Math.random() * (endDate - startDate));
    let hour = 0 + Math.random() * (23 - 0) | 0;
    let minute = 0 + Math.random() * (59 - 0) | 0;
    let second = 0 + Math.random() * (59 - 0) | 0;
    date.setHours(hour);
    date.setMinutes(minute);
    date.setSeconds(second);
    return date;
};

console.log(randomDate(new Date(Date.now()- 24*60*60*1000).getTime(),Date.now()))