Yes, but the span between the past and present was fixed at 20 years, even when "20 years" was technically when vanilla XI started. The Shadow Lord missions says he rose 20 years ago and got the beastmen to start the Crystal War, yet the Wings of the Goddess missions also say that the Crystal War happened 20 years ago, even though there were 3 expansions in between. Time never moved.
I guess you could argue it as shorthand (rounding down) but ehhhh. Let's just says it's a wibbly wobbly timey wimey thing.