I need help change date birthday format

[guslinus]

I have installed prestashop 1.7.6.8

I need to change the birth date format, I did it in the backoffice as shown in the image data_format_1.png but when I type the date in the Birthday date field in Portuguese Brazil it automatically returns to the format original yyyy-mm-dd when I click the button to finish the registration. Do I have to change the format in Mysql? how do I which DB table? Could someone help the date format I need is the Portuguese Brazil format dd / mm / yyyy and I would like to keep with the bars instead of the dashes.
How do I have autocomplete in the field ie
do the __ / __ / __ bars be added automatically?

[Gezel]

try change d/m/y to d-m-y  save en clear cache

[Er_sanjay]

On 10/30/2020 at 5:14 PM, Gezel said:

try change d/m/y to d-m-y  save en clear cache

@Gezel  thanks for suggestion where need to change the date format  ?

[Gezel]

Sory for the late reaction the picture explain i think