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如何在Excel中查找每個月的第一個或最後一個星期五?

通常星期五是一個月中的最後一個工作日。 如何在Excel中根據給定的日期找到第一個或最後一個星期五? 在本文中,我們將指導您如何使用兩個公式來查找每月的第一個或最後一個星期五。

查找一個月的第一個星期五
查找一個月的最後一個星期五


查找一個月的第一個星期五

例如,在給定的日期1/1/2015中位於單元格A2中,如下所示。 如果要根據給定日期查找每月的第一個星期五,請執行以下操作。

1.選擇一個單元格以顯示結果。 在這裡,我們選擇單元格C2。

2.複製以下公式並將其粘貼到其中,然後按 Enter 鍵。

=CEILING(EOMONTH(A2,-1)-5,7)+6

然後,日期顯示在單元格C2中,這意味著2015年1月的第一個星期五是日期2/2015/XNUMX。

筆記:

1.如果要查找其他月份的第一個星期五,請在A2單元格中輸入該月的指定日期,然後使用公式。

2.在公式中,A2是給定日期所在的參考單元格。 您可以更改它以滿足您的需求。

查找一個月的最後一個星期五

給定的日期1/1/2015位於單元格A2中,要在Excel中查找本月的最後一個星期五,請執行以下操作。

1.選擇一個單元格,將以下公式複製到其中,然後按 Enter 獲得結果的關鍵。

=DATE(YEAR(A2),MONTH(A2)+1,0)+MOD(-WEEKDAY(DATE(YEAR(A2),MONTH(A2)+1,0),2)-2,-7)

然後,2015年2月的最後一個星期五將顯示單元格BXNUMX。

備註:您可以將公式中的A2更改為給定日期的參考單元格。


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Comments (11)
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This comment was minimized by the moderator on the site
Even shorter 😅
=lambda(Date;WeekDay;EOMONTH(Date;0)-WEEKDAY(EOMONTH(Date;0);WeekDay+10)+1
Where "WeekDay" parameter is 1=Monday, 7=Sunday
This comment was minimized by the moderator on the site
=lambda(Date;WeekDay;EOMONTH(Date;0)-WEEKDAY(EOMONTH(Date;0);WeekDay+10)+1)

I forgot a bracket at the end
This comment was minimized by the moderator on the site
Vậy công thức tính thứ sáu tuần thứ 2 của tháng như thế nào vậy ban?
This comment was minimized by the moderator on the site
Hi Tâm Cao Điền,
Suppose you want to calculate the second friday of the month based on the given date in A1, you can try the following formula:
=A18-DAY(A18)+CHOOSE(WEEKDAY(A18-DAY(A18),2),11,10,9,8,14,13,12)
This comment was minimized by the moderator on the site
porque cuando lo pruebo tal cual me sale error ?
o sea estoy copiando y pegando y no funciona

alguien sabe?
This comment was minimized by the moderator on the site
Hi andre,
Can you tell me which formula you used in the post? And what error your are experiencing?
This comment was minimized by the moderator on the site
Why not make the "last Friday" formula: =CEILING(EOMONTH(A2,0)-5,7)-1? That works for all dates I have tried....
This comment was minimized by the moderator on the site
Hi Eric,
Thanks for sharing it.
This comment was minimized by the moderator on the site
Hello and thank you for this formula. I am not an Excel guru and acnnot easily work out how to change this formula for the last Friday to be the Last Monday, or any other day. Can you please explain how to interpret this.
This comment was minimized by the moderator on the site
Matt,

The way the formula works is: First we find the last day of the month with the EOMONTH() function. For the last day of the current month, we use "0" as the month offset. For the previous month, it would be -1. (Either "=EOMONTH(A2,0)" or "=EOMONTH(A2,-1)".)

Then, in the "=CEILING()" function, we subtract the number of days required to bring us back to Sunday from the day for which we are searching. (For Tuesday, it would be -2, so we make the formula so far: "=CEILING(EOMONTH(A2,0)-2...."

We use the "significance" value of "7" because weeks are seven days long (of course).This finds the date of either the previous Saturday, or the following Saturday (Excel dates started with 1/1/1900, which was a Sunday. So if you enter a "1" in cell A2 with the Long Date format, the cell would read: "Sunday, January 1, 1900".). For that reason, the =CEILING() function, using "7" as the "significance" argument returns Saturday, which is always a multiple of 7 in Excel. Now the formula is "=CEILING(EOMONTH(A2,0)-2,7...".

Now we need to return the date to a Tuesday, so we either subtract 4 for the last Tuesday of the month, or add 3 for the first Tuesday of the next month. So the final formula is, respectively, either "=CEILING(EOMONTH(A2,0)-2,7)-4" or "=CEILING(EOMONTH(A2,0)-2,7)+3".

We can work through the math by assuming the last day of the month is either a Monday (assume its value is 9 - for ease of illustration, so the values do not go negative) or a Wednesday (assume value 11). "EOMONTH()" will return either of those days (9 or 11). Subtracting 2 results in the previous Saturday (value 7) or Monday (value 9), respectively. The CEILING() function then returns, respectively, the previous Saturday (value 7, because the ceiling of 7 with significance 7 is 7) or the current Saturday (value 14, because the ceiling of 9, significance 7, is 14). Subtracting 4 results in the previous Tuesday (value 3) or the current week's Tuesday (value 10), respectively. For the first Tuesday of the following month, adding 3 to the Saturday value (7 or 14) returns either Tuesday value 10, or Tuesday value 17, respectively.


Hopefully that helps you understand so that you can modify the formula as necessary. You can even change it to find the second Tuesday, or second to last Tuesday, by adding or subtracting an additional 7, respectively.
This comment was minimized by the moderator on the site
Hi Matt,
You just need to change the last number -7 to -1 to solove the problem.
=DATE(YEAR(A2),MONTH(A2)+1,0)+MOD(-WEEKDAY(DATE(YEAR(A2),MONTH(A2)+1,0),2)-2,-1)
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