WEEKDAY
Returns the day of the week for the given date value. The day is returned as an integer between 1 (Sunday) and 7 (Saturday) if no type or type=1 is specified. For other types, see the table below.
構文
WEEKDAY(数値;タイプ)
数値 に入力したシリアル値に対応する曜日が返されます。
Type is optional and determines the type of calculation.
Type |
Weekday number returned |
1 or omitted |
1 (Sunday) through 7 (Saturday). For compatibility with Microsoft Excel. |
2 |
1 (Monday) through 7 (Sunday). |
3 |
0 (Monday) through 6 (Sunday) |
11 |
1 (Monday) through 7 (Sunday). |
12 |
1 (Tuesday) through 7 (Monday). |
13 |
1 (Wednesday) through 7 (Tuesday). |
14 |
1 (Thursday) through 7 (Wednesday). |
15 |
1 (Friday) through 7 (Thursday). |
16 |
1 (Saturday) through 7 (Friday). |
17 |
1 (Sunday) through 7 (Saturday). |
These values apply only to the standard date format that you select under .
例
=WEEKDAY("2000-06-14") returns 4 (the Type parameter is missing, therefore the standard count is used. The standard count starts with Sunday as day number 1. June 14, 2000 was a Wednesday and therefore day number 4).
=WEEKDAY("1996-07-24";2) returns 3 (the Type parameter is 2, therefore Monday is day number 1. July 24, 1996 was a Wednesday and therefore day number 3).
=WEEKDAY("1996-07-24";1) returns 4 (the Type parameter is 1, therefore Sunday is day number 1. July 24, 1996 was a Wednesday and therefore day number 4).
=WEEKDAY("2017-05-02";14) returns 6 (the Type parameter is 14, therefore Thursday is day number 1. May 2, 2017 was a Tuesday and therefore day number 6)
=WEEKDAY(NOW()) returns the number of the current day.
To obtain a function indicating whether a day in A1 is a business day, use the IF and WEEKDAY functions as follows:
IF(WEEKDAY(A1;2)<6;"Business day";"Weekend")