As far as I know, it is never stated when the game takes place. However, some of the documents you collect may have a hint. In particular, the ones on the corporations contain a market share value that is accompanied by a fiscal year. The latter is written only as FY48, which leads me to believe Catalyst takes place in or around 2048. (Moreover, the establishment year of the corporations is written similarly, with some having been founded as far back as FY01.)
Just a little something I've noticed. Considering the near-future aesthetic of Glass, the 2040's seem like a safe bit anyway.
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I saw that too but I was thinking it was in a different world from ours with different geography and much farther in the future because of the technology that exists. For example the grid links and the computer contact lenses seems a bit far away and building something on the scale of the shard or the possibility of something as crazy as refection being made seems farther away than about 30 years.
Using -FY- as a way to tell the year also makes me think it's not 2048 on our earth because it seems like that way you would write B.C.E or C.E (not saying MEC is set way in the past). Meaning maybe mirrors edge is in a different version of earth with it's own different geology and timeframe where they say FY etc. instead of BCE ect. and the world has played out differently and so has time so in MEC's world the next year could be FZ49 or something like that and because the world's time frame in not like ours technology does not follow ours, so there are perfected flying drones but resources are just about all used up and pollution is much much worse that what we have now but because the the differences in worlds maybe their current time FY48 could be our current 2016 or any other possible year.
But it's interesting nonetheless.
Well the region in the game is clearly future Australia, if you observe the maps in the Intel section. I think that it would be completely possible if FY48 referred to 2048, based on the way technology has developed over the past few decades.
But don't forget that FY stands for 'financial year' which fits into the Conglomerate's way of thinking. Given that the earliest date we see is FY01 (the foundation year of one of the main corporations, I can't remember which one) it's perfectly possible that they reset the calendar at that point. So it could be absolutely any year by our calendar!