Merge Month function in SUMIFS function

Please have a look at the attached file.
Sheet "FinanceData" column A to I are client data, I have to manipulate column J and K to fetch data to Month tab.
Instead of manipulation in separate columns, I want to include those formulas in Sumifs function in Month tab.
Please help me how to retrieve exact month text like 'Janaury', 'February' etc from date column in FinanceData sheet and replace the below formula.

=SUMIFS(FinancialData!$C$2:$C$33,FinancialData!$K$2:$K$33,$C4)