# lunarweekname - script and chart function
This function returns a display value showing the year and lunar week number corresponding to a timestamp of the first millisecond of the first day of the lunar week containing date. Lunar weeks in QlikView are defined by counting 1 January as the first day of the week.
Syntax:
LunarWeekName(date [, period\_no[, first\_week\_day]])
**Return data type:** dual
Arguments:
LunarWeekName arguments
| Argument | Description |
| --- | --- |
| date | The date to evaluate. |
| period\_no | period\_no
is an integer or expression resolving to an integer, where the value 0 indicates the lunar week which contains
date. Negative values in period\_no indicate preceding lunar weeks
and positive values indicate succeeding lunar weeks. |
| first\_week\_day | An offset that may be greater than or less than zero. This changes the beginning of the year by the specified number of days and/or fractions of
a day. |
Example 1:
`lunarweekname('12/01/2013')`
Returns 2013/02.
Example 2:
`lunarweekname('12/01/2013', -1)`
Returns 2013/01.
Example 3:
`lunarweekname('12/01/2013', 0, 1)`
Returns 2013/02.
Example 4:
Add the example script to your document and run it. Then add, at least, the fields listed in the results column to a sheet in your document to see the result.
In this example, for each invoice date in the table, the lunar week name is created from the year in which the week lies and its associated lunar week number, shifted one week by specifying period\_no as 1.
`TempTable:` `LOAD RecNo() as InvID, * Inline [` `InvDate` `28/03/2012` `10/12/2012` `5/2/2013` `31/3/2013` `19/5/2013` `15/9/2013` `11/12/2013` `2/3/2014` `14/5/2014` `13/6/2014` `7/7/2014` `4/8/2014` `];` ` ` `InvoiceData:` `LOAD *,` `LunarWeekName(InvDate, 1) AS LWkName` `Resident TempTable;`
`Drop table TempTable;`
The resulting table contains the original dates and a column with the return value of the lunarweekname() function. You can display the full timestamp by specifying the formatting in the chart properties.
Example 4 results
| InvDate | LWkName |
| --- | --- |
| 28/03/2012 | 2012/14 |
| 10/12/2012 | 2012/51 |
| 5/2/2013 | 2013/07 |
| 31/3/2013 | 2013/14 |
| 19/5/2013 | 2013/21 |
| 15/9/2013 | 2013/38 |
| 11/12/2013 | 2013/51 |
| 2/3/2014 | 2014/10 |
| 14/5/2014 | 2014/21 |
| 13/6/2014 | 2014/25 |
| 7/7/2014 | 2014/28 |
| 4/8/2014 | 2014/32 |