A new field type was added to Personizely. You can now use date fields in your widget forms. There is one default date field - birthdate, but you can create any amount of them for things like Appointments, Delivery dates, and others by creating a custom field.
These fields are later passed to any integration provider you use, as a date field if the integration supports it or as text if it doesn't.
You can also use the data collected via these fields in your targeting.