This example compares two boundary-window duration interpretations in the same time zone: exact elapsed duration versus wall-clock scheduled duration.
Use this page after the operational-day and DST pages when you want to isolate one specific question: does this rule mean elapsed time or local wall-clock schedule?
Start with Operational Day Demo, then review DST Critical Cases, or return to the Examples Tour.
Use these to jump straight to DST-sensitive window examples or a stable non-DST baseline.
The list mixes equatorial, temperate, and near-polar locations.
| Interpretation | Sign-off local time | Exact elapsed from start | Clock-face span | Spans transition |
|---|