# businessMonthEnd {#businessmonthend}

**Parent topic:**[Functions](../../Functions/category.md)

## Syntax {#syntax}

`businessMonthEnd(X, [offset], [n=1])`

## Arguments {#arguments}

**X** is a scalar/vector of data type DATE, DATEHOUR, DATETIME, TIMESTAMP or NANOTIMESTAMP.

**offset** \(optional\) is a scalar of the same data type as *X*. It must be no greater than the minimum value of *X*. The default value is the minimum value of *X*.

**n** \(optional\) is a positive integer. The default value is 1.

## Details {#details}

Return the last business day \(Monday to Friday\) of the month that *X* belongs to.

If parameter *offset* is specified, the result is updated every *n* months. The parameters *offset* and *n* must be specified together, and *offset* takes effect only when *n* &gt; 1.

## Examples {#examples}

```
businessMonthEnd(2010.10.12);
// output: 2010.10.29

businessMonthEnd(2010.10.12, 2000.03.31, 3);
// output: 2010.12.31

date=2016.04.12+(1..10)*30
time = take(09:30:00, 10)
sym = take(`MSFT,10)
price= 49.6 29.46 29.52 30.02 174.97 175.23 50.76 50.32 51.29 52.38
qty = 2200 1900 2100 3200 6800 5400 1300 2500 8800 4500
t1 = table(date, time, sym, qty, price);
t1;
```

|date|time|sym|qty|price|
|----|----|---|---|-----|
|2016.05.12|09:30:00|MSFT|2200|49.6|
|2016.06.11|09:30:00|MSFT|1900|29.46|
|2016.07.11|09:30:00|MSFT|2100|29.52|
|2016.08.10|09:30:00|MSFT|3200|30.02|
|2016.09.09|09:30:00|MSFT|6800|174.97|
|2016.10.09|09:30:00|MSFT|5400|175.23|
|2016.11.08|09:30:00|MSFT|1300|50.76|
|2016.12.08|09:30:00|MSFT|2500|50.32|
|2017.01.07|09:30:00|MSFT|8800|51.29|
|2017.02.06|09:30:00|MSFT|4500|52.38|

```
select avg(price),sum(qty) from t1 group by businessMonthEnd(date,2016.01.31,2);
```

|businessMonthEnd\_date|avg\_price|sum\_qty|
|----------------------|----------|--------|
|2016.06.30|39.53|4100|
|2016.08.31|29.77|5300|
|2016.10.31|175.1|12200|
|2016.12.30|50.54|3800|
|2017.02.28|51.835|13300|

Related functions: [businessMonthBegin](businessMonthBegin.md), [monthBegin](../m/monthBegin.md), [monthEnd](../m/monthEnd.md), [semiMonthBegin](../s/semiMonthBegin.md), [semiMonthEnd](../s/semiMonthEnd.md)

