所有需要 Date 的选项都可以处理Date 对象 a String formatted according to the given format or a timedelta relative to today, eg -1d , +6m +1y , etc, where valid units are d (day), w (week), m (month), and y (year).



你也可以指定一个符合 ISO-8601 格式的日期时间，就可以忽略下面的格式：-All need to　Date　option can handle a Date object　a String formatted according to the given format　or a timedelta relative to today, eg　-1d ,　+ 6m+ 1y , etc, where valid units are　d　(day),　w　(week),　m　(month), and　y　(year).



You can also specify a format consistent with ISO-8601 date and time, you can ignore the following format: