How often will this cron job execute

[T o n g <mlist4suntong@yahoo.com>]

Hi,

I've got the following entry in my cron job:

1 1 1 */2 * me my-this-job

How often will it execute?

Checking the log, I notice that it run on Jan 1 and Mar 1. That's really 
not something that I've been expecting for. I have another cron job fired 
at Feb 1, so no doubt that my cron was working on Feb 1 and my my-this-job
didn't get fired up then.

Is there anything that I don't know? 

Thanks

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