skymning bedeutet auf Englisch

dusk▼(period of time at the end of day when sun is below the horizon but before full onset of night)
noun
[UK: dʌsk] [US: ˈdəsk]

twilight [twilights]▼(light before rising and after the setting of the Sun)
noun
[UK: ˈtwaɪ.laɪt] [US: ˈtwaɪ.ˌlaɪt]