Albert Einstein
amazed the world in 1905 when he published his paper on
special relativity
, which predicted - among other things - that time was, indeed, relative.
The writers, however, were left unimpressed, because they have been familiar with a similar principle for ages untold: for you see, it is a trivial matter to derive from the
Theory of Narrative Causality that - just as things happen because the plot damn well needs them to - they also happen
when it is convenient for the story.
This phenomenon is known as
Plot Time, and it crops up in a lot of
Tropes, such as:
Not to be confused with
Time Travel Tropes, though the two do frequently cooperate. Compare
24-Hour Trope Clock, for how times are used in plots.