Date.IsInPreviousYear Function in Power Query
The Date.IsInPreviousYear function returns a logical value indicating whether the given Date/DateTime/DateTimeZone occurred during the previous year, as determined by the current date and time on the system.
Syntax
Date.IsInPreviousYear(dateTime as any) as nullable logical
Example: The current year in my system is 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 Year?", each Date.IsInPreviousYear([Year]))
in
Return The output will be shown in the following image:
