Custom field date

[Syriakes]

Hi !
I need your help.
I need to change my custom field date to a calendar.
I explain with picture, already i have that

date mantis.PNG (1.1 KiB) Viewed 2410 times

and i need a calendar where i can pick a date like that

calendar date.PNG (16.05 KiB) Viewed 2410 times

.
Someone know how i can do this please ?

[atrol]

Long requested feature without finally being implemented in standard due to various reasons.
There were some prototypes / pull requests that might help, see https://mantisbt.org/bugs/view.php?id=8957

[Syriakes]

Yes i saw that post. But i don't know how to implement that modification into my code ... I can't change my version of Mantis ...