Theres no set date for when it will happen but Bungie are adding a way to get Edge of Fate seasonal gear like Mint Retrograde, Techsec armor etc. It looks to be part of the Shadow & Order Major Update but we haven't got any specifics on how it'll work yet.

Good question, but the title is a little vague; maybe change it so someone who's "in the know" about these things will recognize what you're asking?