有些学生常称“星期日”为“礼拜天”。其实“星期”和“礼拜”不是一样的意思。“星期”制度是公历(即阳历)中的一种特殊的记日方法,它以七天为一周期,循环往复。这种制度远在公历产生之前就为人们使用了。公元前,古代埃及人发现月亮的变化很有规律:朔日(看不见月亮之日)、上弦(月亮呈半圆形)、望日(圆月)及下弦(一月中月亮第二次呈半圆形)之间的间隔都在七天左右,他们就以月相这种规律性的变化作 Some students often refer to “Sunday” as “Sunday.” In fact, “week” and “week” is not the same meaning. The “week” system is a special diary method in the Gregorian calendar (ie, the Gregorian calendar) that circulates in a cycle of seven days. This system is far from being used by people before the Gregorian calendar. Ancient Egypt, the ancient Egyptians found a very regular change in the moon: the moon day (see the moon), winding (the moon was semicircular), looking at the day (the moon) and the bottom line (moon in January the second half Round) between the interval of seven days or so, they will be on the regular phase of moon phase changes