Feature Request: Allow user-defined datetime formats though use of a key to translate to ISO8601 Standard

[lhcramer]

Include functionality to translate string or numerical formatted fields for time to ISO 8601 standards.

For example a year field with the format of 1986.00 with data type as double, the user would enter the format key of YYYY.00 to produce the ISO 8601 value of 1986-01-01T00:00:00Z.

Example use cases:

• US vs European conventions on month and day order MM-DD-YYYY vs DD-MM-YYYY.
• Time fields that are typed as numerical or string data types to the data type expected by importer.
• Non-Standard date formats such as 9/20/23:30 to become 2020-09-01T23:30:00Z if defined by the key MM/YY/hh:mm