将数值(十进制)格式化为日期

// 将数值格式化为日期
function formatNumberToDate(number) {
  const date = new Date(number);
  const year = date.getFullYear();
  const month = String(date.getMonth() + 1).padStart(2, '0');
  const day = String(date.getDate()).padStart(2, '0');
  
  return `${year}-${month}-${day}`;
}

// 示例用法
const number = 1634567890000;
const formattedDate = formatNumberToDate(number);
console.log(formattedDate); // 输出：2021-10-18

# 将数值格式化为日期
import datetime

def format_number_to_date(number):
    timestamp = int(number / 1000)  # 假设数值是以毫秒为单位的时间戳
    date = datetime.datetime.fromtimestamp(timestamp)
    formatted_date = date.strftime('%Y-%m-%d')
    
    return formatted_date

# 示例用法
number = 1634567890000
formatted_date = format_number_to_date(number)
print(formatted_date)  # 输出：2021-10-18