Hello SANDIP SHARMA,
Have you looked through the examples here: https://community.tableau.com/search.jspa?q=date&place=%2Fplaces%2F60090&depth=ALL or FAQ: To Date Calculations
These examples with example workbooks should assist. If additional assistance is still needed, please post a sample tableau workbook (.twbx) file showing the work attempted so far. Also, please let us know the version number of Tableau in use or else anyone assisting may post a response in newer version of Tableau (assuming you are on an older version).
Thanks for your revert. I think you shared all the links related to date conversion or date format related and few of them are some level of calculation but problem is slight different from the url which you shared with me. Please read my requirement and help me with as it is creating to much problem. For now I have handled the same at database level till I get some workaround here in Tableau. There is a way in Tableau to achieve the same by duplicating the data source and filter the data according to the need of your problem in both the data set and then create a custom field for mobination on day and month then blend both the data set on the same and then you can achieve but I don't want to duplicate my datasource as I have very huge data which is taking hours to get the same. If I will use the same then I have to load the twice one by one for both extract which will take some time to get the data.
Please help me with some alternate, if you have.