I have seen a number of resumes mentioning a list of significant projects worked on, which also mention the start and end dates, like so:
McCool Project (Jan 2009 - Jul 2009)
Achieved this, achieved that, achieved some more cool stuff, and then some more, etc. etc.
I am wondering if mentioning the start and end dates of projects, or even the project duration is really necessary. After all, wouldn't the recruiter be more interested in what your achieved than whether you started in January or March, or even how long the project lasted? Is there any good reason at all to mention this?
Note: I am referring to projects done while being a full-time permanent employee. For a contract-based job, I can totally understand why this information is necessary. (Thanks to JeffO's comment below. )