SharePoint 3.0: Error: Calculated Site Column, Formula Contains a Syntax Error

Description:

When attempting to create a new calculated site column...



...inside the formula, you reference a column name in brackets, such as Year[created]...




...and you are unable to save the new site column, instead you receive an error.

Error:
The formula contains a syntax error or is not supported.
Troubleshoot issues with Windows SharePoint Services.

Solution:

Use parentheses around the brackets. E.g. Year([Created])