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Frequent Visitor

## Month Series

Hi I have date table from 2023 to 2025 i want a column with month series where 36 being december 2025 and 1 being January 2023.

1 ACCEPTED SOLUTION
Super User

hi @esam

t

Aha, try like

Month Series =

DATEDIFF(DATE(2023, 1, 1), [Date], MONTH)+1

11 REPLIES 11
Super User

@esam not sure what your Date table looks like, I simply Assumed that you have only 1 column table as Calendar[Date]

``````Column =
RANKX (
'Calendar',
DATE ( MONTH ( 'Calendar'[Date] ), YEAR ( 'Calendra'[Date] ), 1 ),
,
ASC,
DENSE
)
``````

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Super User

hi @esam

try to add a column like:

Month Series =

DATEDIFF([Date], DATE(2023, 1, 1), MONTH)+1

Frequent Visitor

The solution you provided gave something similar but not accurate it is giving me result in negative

for jan 2023 it is one than feb 2023 0 and for december 2025 -33

Super User

hi @esam

t

Aha, try like

Month Series =

DATEDIFF(DATE(2023, 1, 1), [Date], MONTH)+1

Frequent Visitor

Thank you for the solution @FreemanZ can you explain a bit how this logic is working here !!

also how to get better with dax with real world scenarios

Super User

hi @esam

there is no secret, as long as you know the DATEDIFF function, which returns the number of periods between two dates. In this case, the period is MONTH.

In general,  learning DAX by doing. Try to bring change and value to your daily work with DAX.  If time allows, come back to the community and try to contribute.

Super User

You could try a calculated column like

``````Month series =
VAR ReferenceDate = 'Date'[Date]
VAR PrevMonths =
CALCULATETABLE (
VALUES ( 'Date'[Year month] ),
REMOVEFILTERS ( 'Date' ),
'Date'[Date] < ReferenceDate
)
RETURN
COUNTROWS ( PrevMonths ) + 1
``````
Frequent Visitor

Removefilter with comparison operator is not correct

Super User

I think maybe you've missed a close bracket, the REMOVEFILTERS and comparison are separate.

Frequent Visitor

the series generated by this 13,12,....1

Super User

OK, the below works for me

``````Month series =
VAR ReferenceDate = 'Date'[Date]
VAR PrevMonths =
CALCULATETABLE (
DISTINCT ( 'Date'[Year month] ),
REMOVEFILTERS ( 'Date' ),
'Date'[Date] <= ReferenceDate
)
RETURN
COUNTROWS ( PrevMonths ) ``````

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