Convert dates from MM/DD/YYYY to DD-MM-YYYY

[KC3]

Hi 
I am having a format of MM/DD/YYYY  wanted to change the format in DD/MM/YYYY or DD-MM-YYYY
Please help to change it

Thanks in advance

[Afa_Momin]

date(today(),'DD-MM-YYYY');

[KC3]

It's not happening.