How to change format from mm/dd/year to dd-mmm-yea

hello Seniors,
please solve my query:

I need to change format of data in my excel sheet, for instance data is in the format of mm/dd/year while I want it in dd-mmm-yyyy format.

it changes to my desired vlaue if I change the format first to dd/mm/yyyy and then again change it by formatting the cell.

please provide me with any relevant formula or direct solution to this issue. thankyou.