Convert date in Marketing Cloud

Question

I need a help to change the format of a date MM/dd /yyyy to dd/mm/yyyy

I tried this:

Works!

Now: %%=Format(Now(),"MM/dd/yyyy")=%%

Does not work!

Date of Vestibular: %%=Format(%%Date Vestibular%%, "MM/dd/yyyy")=%%

Results:

Now: 15/07/2016 
Date Vestibular: %%=Format(7/27/2016 12:00:00 AM,"dd/MM/yyyy")=%% 

Answer 1

Personalization Strings are referenced differently in functions and in AMPScript blocks.

Should be something like this:

Now: %%=Format(Now(),"MM/dd/yyyy")=%%
<br>Date of Vestibular: %%=Format([Date Vestibular], "dd/MM/yyyy")=%%

or better:

%%[

var @DateVestibular
set @DateVestibular = AttributeValue("Date Vestibular")

]%%

Now: %%=Format(Now(),"MM/dd/yyyy")=%%
<br>Date of Vestibular: %%=Format(@DateVestibular, "dd/MM/yyyy")=%%