Month Series

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

hi esam 

try to add a column like:

Month Series =

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

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
)