A vigil, from the Latin vigilia meaning 'wakefulness', is a period of purposeful sleeplessness, an occasion for devotional watching, or an observance. The Italian word vigilia has become generalized in this sense and means 'eve'.

Evening is the period of a day that begins at the end of daylight and overlaps with the beginning of night. It generally indicates the period of time when the sun is close to the horizon and comprises the periods of civil, nautical and astronomical twilight. The exact times when evening begins and ends are subjective and depend on location and time of year. It may be used colloquially to include the last waning daytime shortly before sunset.