Duration neglect

Etymology

From "duration" (Latin "durare," to last) and "neglect" (Latin "neglegere," to disregard). The concept comes from Daniel Kahneman’s research in the 1990s on how remembered experience differs from lived experience.

noun phrase · /duh-RAY-shun nih-GLEKT/
The tendency to judge an experience by its emotional peaks and its ending, largely ignoring how long it lasted.
What it names
Explains why a two-week trip and a two-day one can leave equally strong memories — length barely registers in hindsight.
Example
Duration neglect is why a long, pleasant dinner ruined by a sour final course is remembered as bad.
Related idea
The peak-end rule is the flip side that explains it — we recall the most intense moment and the finish, so the stretch in between (its duration) fades.