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Conas an chéad nó an Aoine deireanach de gach mí a fháil in Excel?

De ghnáth is é Dé hAoine an lá oibre deireanach i mí. Conas is féidir leat an chéad Aoine nó an Aoine seo caite a fháil bunaithe ar dháta faoi leith in Excel? San Airteagal seo, tabharfaimid treoir duit ar conas dhá fhoirmle a úsáid chun an chéad Aoine nó an Aoine deireanach de gach mí a fháil.

Faigh an chéad Aoine de mhí
Faigh an Aoine deireanach de mhí


Faigh an chéad Aoine de mhí

Mar shampla, tá dáta faoi leith 1/1/2015 suite i gcill A2 mar atá thíos an pictiúr a thaispeántar. Más mian leat an chéad Aoine den mhí a fháil bunaithe ar an dáta áirithe, déan mar a leanas le do thoil.

1. Roghnaigh cill chun an toradh a thaispeáint. Anseo roghnaímid an cill C2.

2. Cóipeáil agus greamaigh an fhoirmle thíos isteach ann, ansin brúigh an Iontráil eochair.

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

Ansin taispeántar an dáta i gcill C2, ciallaíonn sé gurb é an chéad Aoine d’Eanáir 2015 an dáta 1/2/2015.

nótaí:

1. Más mian leat an chéad Aoine de mhíonna eile a fháil, cuir isteach an dáta sonraithe den mhí sin i gcill A2, agus ansin bain úsáid as an bhfoirmle.

2. San fhoirmle, is é A2 an chill tagartha a aimsíonn an dáta áirithe. Is féidir leat é a athrú chun freastal ar do chuid riachtanas.

Faigh an Aoine deireanach de mhí

Aimsíonn an dáta tugtha 1/1/2015 i gcill A2, chun an Aoine deireanach den mhí seo a fháil in Excel, déan mar a leanas le do thoil.

1. Roghnaigh cill, cóipeáil an fhoirmle thíos isteach ann, agus ansin brúigh an Iontráil eochair chun an toradh a fháil.

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

Ansin tá an chill B2015 á thaispeáint ag an Aoine deireanach d’Eanáir 2.

nótaí: Is féidir leat A2 san fhoirmle a athrú go cill tagartha an dáta atá tugtha agat.


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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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