Fix date format parsing issue, close Java GitHub issue 333

[jchen293]

Description

Fix the date format parsing issue and close Java GitHub issue 333. The Date Deserilizer is currently not implemented correctly, this PR corrects the issue.

Testing

Add unit tests to ensure each date format is parsed correctly

Pull Request Type

Please select the option(s) that are relevant to this PR.

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Improvement (fixing a typo, updating readme, renaming a variable name, etc)