These both sound interesting, [digression]but it's offputting from the fiction to see explicitly mentioned future times. The easy reason is that it's lazy writing, but more seriously, it makes it difficult to get into the story, because there's always the thought in
a reader that all the described, even if plausible about
some time (after publication), it's not likely about that explicitly mentioned time---there's just too much time, too much possibilities, unless it's the near future that the ideas are plausible. But in the case of near-nonfictional fictional near-future,.. I'm not sure exactly what it is.
There are also science-fantasies whose diegetic timekeeping systems are overtly different from the ones we use, but that just makes it more complicated, and is something I rarely ever care about.
It's different about past times, but the result is still offputting. Unless I'm already familiar with the time period (i.e. I'm not), if it's a significant detail, I have to learn about it to understand that context, but if it's an insignificant detail, then it would be much cleaner to not mention it.
Usually I can just ignore it and it's not a problem, but I'll miss any additional meaning that might be derived from that, such as order of events, or interesting chronological systems.[/digression]