Let's go step by step,
1) 1st we will read the entire excel sheet, & create DataTable Output Variable.
2) Then, by using for each row,
1. Get row item: In which as you retrieve datecolumn value from your excel sheet, create Variable in "Value" field of the type Generic Value.(This will be useful for further part)
2. Assign that created Variable to a new variable of same generic type.
3. Now used "Format Value" activity, and set format of dateTime of your choice like dd/MM or MM/dd etc.
4. Now, by this you can use writeline or Type into, for your further part of execution or to see your expected Output.
For more clear idea, i will attach Screenshot here!
Hope this will work for your flow!