Night Time Calculation

Wader automatically calculates night time based on the apparent sunset and sunrise at your departure and arrival airports, using the NOAA Solar Calculator methodology.

Night time is the portion of your block time that falls after sunset at the departure airport or before sunrise at the arrival airport, whichever applies.

Civil twilight

Civil twilight is not used in Wader’s night time calculation. In practice, this typically results in a difference of 20–30 minutes per flight compared to civil twilight-based calculations.

Manual adjustment

If you need to set night time manually — for example, to match a different regulatory standard:

1. Open the flight and save it first.
2. Tap Edit Times.
3. Enter your night time value directly.

Caution

Save the flight before using Edit Times. Unsaved changes may be lost when switching to the time editor.

Turning off auto night calculation

Auto night calculation can be turned off in Preferences. When off, you enter night time manually on every new flight.