Date.IsInPreviousDay Function in Power Query

The Date.IsInPreviousDay function indicates whether the given datetime value dateTime occurs during the previous day, as determined by the current date and time on the system.

Syntax

Date.IsInPreviousDay(dateTime as any) as nullable logical

Example: Today is 7th of August 2024.

Power Query M

let
  Source = Table.FromRecords(
    {
      [Year = "20-07-2024"], 
      [Year = "21-07-2024"], 
      [Year = "22-07-2024"], 
      [Year = "23-07-2024"], 
      [Year = "24-07-2024"], 
      [Year = "25-07-2024"], 
      [Year = "26-07-2024"], 
      [Year = "27-07-2024"], 
      [Year = "28-07-2024"], 
      [Year = "29-07-2024"], 
      [Year = "30-07-2024"], 
      [Year = "31-07-2024"], 
      [Year = "01-08-2024"], 
      [Year = "02-08-2024"], 
      [Year = "03-08-2024"], 
      [Year = "04-08-2024"], 
      [Year = "05-08-2024"], 
      [Year = "06-08-2024"]
    }
  ), 
  #"Changed Type" = Table.TransformColumnTypes(Source, {{"Year", type date}}), 
  Return = Table.AddColumn(#"Changed Type", "Is in Previous Day?", each Date.IsInPreviousDay([Year]))
in
    Return 

The output will be shown in the following image:

Date.IsInPreviousDay function in Power Query