Keep the preferences consistent
Turn on a second location and enter its own coordinates and time zone. Both locations use the same available hours, number of local nights and darkness preferences. This is a comparison of your chosen schedule rather than a ranking of all possible observing sites.
Differences can come from latitude, longitude, time-zone rules, Moon position or available forecasts. A longer matching window does not establish a darker or safer site, because terrain, access and light pollution are outside this calculation.
Check daylight-saving boundaries
On a spring transition, a local clock hour may not exist. On an autumn transition, an hour can occur twice. The planner evaluates real UTC instants and uses the time-zone database to identify the corresponding local availability.
The compact chart can draw repeated wall-clock hours on top of one another. Use the UTC CSV or calendar when exact elapsed duration matters. The report’s local start and end include a time-zone designation for easier review.
Import a calendar with context
The ICS download contains UTC start and end values. Calendar applications can display them in your current time zone, so verify the location label and date after import. The event description retains the approximate five-minute resolution and weather status.
Keep a separate plan for each destination when organizing a group. Review the evidence file before sharing because it includes the selected coordinates. A planning window is a useful appointment candidate, not a reservation, access permission or promise of visible objects.