No. Due to the material, coating, and properties of the weekly lenses, they are meant for use for a week only. Besides, bacterial / fungi might have already happily been living on the lens for the past months.
Also, you should not be storing your lenses in saline, but in multipurpose solution (or H2O2, if you're using such the peroxide system like AOSept and OxySept).
For weekly or bi-weekly lenses, when you remove from eye, rinse and rub with multipurpose solution before storing in lens case with multipurpose solution. When you remove it the next day, rinse with saline before insertion into eye. Rinse case and leave to dry. Do not top up solution into the lens case.