LibreOffice 25.2 Help
WEEKNUM calculates the week number of the year for the internal date value as defined in ODF OpenFormula and compatible with other spreadsheet applications.
Supported are two week numbering systems:
| 시스템 | 설명 | 
|---|---|
| System 1 | The week containing January 1 is the first week of the year, and is numbered week 1. | 
| System 2 | The week containing the first Thursday of the year is the first week of the year, and is numbered week 1. That means that week number 1 of any year is the week that contains January 4th. ISO 8601 defines this system and that the week starts on Monday. | 
WEEKNUM(숫자; Mode)
숫자는 날짜의 내부 값입니다.
Mode sets the start of the week and the week numbering system. This parameter is optional, if omitted the default value is 1.
| 시스템 | 모드 | Day of the week | 
|---|---|---|
| System 1 | 1 | Sunday | 
| 2 | 월요일 | |
| 11 | 월요일 | |
| 12 | 화요일 | |
| 13 | 수요일 | |
| 14 | 목요일 | |
| 15 | 금요일 | |
| 16 | 토요일 | |
| 17 | Sunday | |
| System 2 | 21 | Monday (ISO 8601) | 
| 150 | (ISO 8601, for interoperability with Gnumeric) | 
=WEEKNUM(DATE(1995;1;1);1) returns 1
=WEEKNUM(DATE(1995;1;1);2) returns 1. Using System 1, the week containing January 1 is the first week of the year.
=WEEKNUM(DATE(1995;1;1);21) returns 52. Week 1 starts on Monday, 1995-01-02.
=WEEKNUM(DATE(1999;1;1);21) returns 53. Week 1 starts on Monday, 1999-01-04.