摘要：
Lucky and Good Months by Gregorian CalendarTime Limit:1000MSMemory Limit:65536KTotal Submissions:887Accepted:258DescriptionHave you ever wondered why normally an year has 365 days, not 400 days? Why August have 31 days, but February have only 28 days? Why there are 7 days, not 6 days, in a week? Do 阅读全文
