---
name: "BIS_fnc_monthDays"
type: function
status: ok
groups: ["Math", "Environment"]
arma3_since: "1.10"
locality: {"argument": null, "effect": null, "server_exec": false}
source: https://community.bistudio.com/wiki/BIS_fnc_monthDays
revid: 328404
updated: 2022-07-13T16:00:49Z
---

# BIS_fnc_monthDays

*Function · Math, Environment · Arma 3 v1.10*

## Description

Returns number of days in given month. Takes in account for leap year.

## Syntax

```sqf
[year, month] call BIS_fnc_monthDays
```

**Parameters:**

- `year`: [Number](../topics/Number.md) - a non-decimal number
- `month`: [Number](../topics/Number.md) - a non-decimal number in range 1..12

**Returns:** [Number](../topics/Number.md) - number of days in given month

## Examples

### Example 1

```sqf
private _daysInThisMonth = [date select 0, date select 1] call BIS_fnc_monthDays;
```

## See also

[date](../commands/date.md) · [BIS_fnc_showTime](../functions/BIS_fnc_showTime.md) · [BIS_fnc_secondsToString](../functions/BIS_fnc_secondsToString.md)

<sub>Source: [BI Community Wiki — BIS fnc monthDays](https://community.bistudio.com/wiki/BIS_fnc_monthDays) (revision 328404).</sub>