Column chart with most recent two date values

Hi harshadrokade ,

I updated the sample pbix file, please check whether it can return your expected result. You can find the details in the attachment.

1. Create a date dimension table(DO NOT create any relationship with your fact table)

Date = VALUES('Table'[Month-DD/MM/YYYY])

2. Update the formula of measure [] as below

Most recent two date values = 
VAR _selstu =
    SELECTEDVALUE ( 'Table'[Student name] )
VAR _selsubject =
    SELECTEDVALUE ( 'Table'[Subject name] )
VAR _maxdate =
    SELECTEDVALUE ( 'Date'[Month-DD/MM/YYYY] )
VAR _secondmdate =
    CALCULATE (
        MAX ( 'Table'[Month-DD/MM/YYYY] ),
        FILTER ( ALLSELECTED ( 'Table' ), 'Table'[Month-DD/MM/YYYY] < _maxdate )
    )
RETURN
    CALCULATE (
        SUM ( 'Table'[Value] ),
        FILTER ( 'Table', 'Table'[Month-DD/MM/YYYY] IN { _maxdate, _secondmdate } )
    )

3. Apply the date field as slicer option to replace the field in fact table

Best Regards