My b2evolution Version: Not Entered

Hey All,
So I am trying to use a blog as a gig calendar for my bands site. I have it set up to display all posts. that's working correctly but my question is as follows:

I am just looking to split it into 2 categories based on the date_start field. Is there any way to to display the posts like this:
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Upcoming Gigs

<display future posts>

Previous Gigs

<display all other posts>

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I am not too proficient in PHP...so any help would be much appreciated.
Thanks!