Hi @pchristou,
Could you please tell me that how you validate in your PowerApps app or validate in your list?
Do you want to validate the date input before you save it?
I think you should validate it in your Power Apps app.
I have a simple test for you, please take a try as below.
1). Add a TextInput for date input
2). Set the OnChange property of the TextInput as below:
If(
!IsMatch(
TextInput_Date.Text,
"\d{4}-\d{2}-\d{2}"
),
Notify(
"Please input date in YYYY-MM-DD format!",
NotificationType.Error
)
)
3). If you want to save it to your list, please add a button and set the OnSelect as below:
If(
!IsMatch(
TextInput_Date.Text,
"\d{4}-\d{2}-\d{2}"
),
Notify(
"Please input date in YYYY-MM-DD format!",
NotificationType.Error
,
Patch(
YourList,
Defaults(YourList),
{
Date: TextInput_Date.Text
}
)
)
