It appears you are creating a Date type field.
If so, please select Date as the Type in the dropdown list. This will create a datepicker field, and help ensure that only valid dates are entered.
- If you expect this to be a date and do not set it as a date type, then the User will be able to enter a non-date value, which can result in unwanted behavior.
- If this is not a Date type field, then disregard this message and continue.