I made updates on all of these pages where the date was being used. I noticed though that you named the form element for this Date as well as the column name. You may be able to get away with this but it is a bad idea to use reserved words like date for column names in your db. You can do a quick search to come up with reserved words that you should avoid using in your database tables.
Give the updated pages a try to see if gets you the result you desire, let me know how it goes.