change the customer birthday from text input to date picker
/classes/form/CustomerFormatter.php
line 196
if ($this->ask_for_birthdate) {
$format['birthday'] = (new FormField())
->setName('birthday')
// edited by Jimmy @19Sep2022 - change 'text' to 'date' so it can pick date
->setType('date')
->setLabel(
$this->translator->trans(
'Birthdate',
[],
'Shop.Forms.Labels'
)
)