自己计算当前时间的星期；取得当前时间，分别得到年、月、日，通过这个公式，计算得到星期；当然可以把年、月、日作为参数输入；-own calculation of the current time weeks; Get current time, won the year, month, day and the passage of this formula, calculated weeks; Certainly can, month, day as a parameter input;