Change to html5 datefield to get date picker

forms.py

@@ -1,6 +1,7 @@
 import safe
 from flask_wtf import FlaskForm
-from wtforms import StringField, PasswordField, DateField, IntegerField, SubmitField
+from wtforms import StringField, PasswordField, IntegerField, SubmitField
+from wtforms.fields.html5 import DateField
 from wtforms.validators import DataRequired, Length, EqualTo, InputRequired, \
     ValidationError, NumberRange, Optional