Do commit dates on GitHub matter for job applications?

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I've recently decided to get back on the job hunt after a 2 year personal absence. In that time, I did a lot of fooling around on Github and contributed to a bunch of projects, both my own and on other's projects. I haven't gotten around to completing much, just little additions here and there. So as I'm applying to new jobs, I'm just wondering how much headhunters and hiring staff will look at commit dates as big factors on my resume.