---
title: date.monthDay() function
description: date.monthDay() returns the day of the month for a specified time. Results range from [1 - 31].
url: https://docs.influxdata.com/flux/v0/stdlib/date/monthday/
estimated_tokens: 1244
product: Flux
version: v0
---

# date.monthDay() function

-   Flux 0.37.0+
-   View InfluxDB support

`date.monthDay()` returns the day of the month for a specified time. Results range from `[1 - 31]`.

##### Function type signature

```js
(t: A, ?location: {zone: string, offset: duration}) => int where A: Timeable
```

For more information, see [Function type signatures](/flux/v0/function-type-signatures/).

## Parameters

### t

(Required) Time to operate on.

Use an absolute time, relative duration, or integer. Durations are relative to `now()`.

### location

Location used to determine timezone. Default is the `location` option.

## Examples

-   [Return the day of the month for a time value](#return-the-day-of-the-month-for-a-time-value)
-   [Return the day of the month for a relative duration](#return-the-day-of-the-month-for-a-relative-duration)
-   [Return the current day of the month](#return-the-current-day-of-the-month)

### Return the day of the month for a time value

```js
import "date"

date.monthDay(t: 2020-02-11T12:21:03.29353494Z)// Returns 11

```

### Return the day of the month for a relative duration

```js
import "date"

option now = () => 2020-02-11T12:21:03.29353494Z

date.monthDay(t: -8d)// Returns 25

```

### Return the current day of the month

```js
import "date"

date.monthDay(t: now())
```

[date/time](/flux/v0/tags/date/time/)