Date.StartOfMonth

Date.StartOfMonth is a Power Query M function that returns the start of the month that contains the specified date(Time). Your input must be a date or datetime value.

Compatible with: Power BI Service Power BI Desktop Excel Microsoft 365

Syntax

Date.StartOfMonth( dateTime as any ) as any

Description

Returns the start of the month that contains dateTime. dateTime must be a date or datetime value.

Examples

Find the start of the month for October 10th, 2011, 8:10:32AM.

// Output: #datetime( 2011, 10, 1, 0, 0, 0 )
Date.StartOfMonth( #datetime( 2011, 10, 10, 8, 10, 32 ) )

Related articles

Learn more about Date.StartOfMonth in the following articles:

• Create Date Table or Calendar in Power Query M
  Learn how to create a dynamic calendar table in Power Query’s M language. Build your custom columns and claim your free Date Table Script. » Read more

Related functions

Other functions related to Date.StartOfMonth are:

• Date.StartOfDay
• Date.StartOfQuarter
• Date.StartOfWeek
• Date.StartOfYear

Last update: August 25, 2023 | Contribute » | Contributors: Rick de Groot
Microsoft documentation: https://learn.microsoft.com/en-us/powerquery-m/date-startofmonth
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