---
title: "Use the MONTHTODATE Function to Cumulate Daily Metrics Monthly"
slug: "monthtodate-function"
description: "Learn to use the MONTHTODATE function to cumulate values by day and reset totals at the start of each month in Pigment."
updated: 2025-05-30T09:43:24Z
published: 2025-08-22T11:59:25Z
---
> ## Documentation Index
> Fetch the complete documentation index at: https://kb.pigment.com/llms.txt
> Use this file to discover all available pages before exploring further.
# MONTHTODATE function
## Description
Cumulates a Metric defined on the Day Time Dimension and resets the cumulation each month.
> Equivalent of: [CUMULATE(Metric, Day, Day.Month](/v1/docs/cumulate-function)
## Syntax
`MONTHTODATE(Metric [, Aggregation])`
## Arguments
| Argument | Type | Dimensions | Description |
| --- | --- | --- | --- |
| *Metric* (required) | Number | Day Time Dimension | Number to cumulate. |
| *Aggregation* (optional) | Aggregation | | Available values: SUM, AVG, MIN, MAX. By default, the aggregation is SUM. |
## Returns
| Type | Dimensions |
| --- | --- |
| Number | Day Time Dimension |
## Examples
| Formula | Description |
| --- | --- |
| `MONTHTODATE('Quantity Sold')` | Cumulates the Metric ‘Quantity Sold’ (each day is added to the sum of the previous days and reset when the month changes). |
## See also
Related articles: [CUMULATE](/v1/docs/cumulate-function), [QUARTERTODATE](/v1/docs/quartertodate-function), [YEARTODATE](/v1/docs/yeartodate-function)
> [!TIP]
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>
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