vigil

A watch kept during normal sleeping hours.

The act or a period of observing; surveillance.

The eve of a religious festival observed by staying awake as a devotional exercise.

Ritual devotions observed on the eve of a holy day.

The act of keeping awake; abstinence or forbearance from sleep at the natural or ordinary hours of rest; the state of being awake during the natural time for sleep; sleeplessness; wakefulness; watch: commonly in the plural.

Devotional watching; hence, devotions, services, praise, prayer, or the like performed during the customary hours of sleep; nocturnal devotions: commonly in the plural.

Eccles.: Originally, in the early church, the watch kept in a church or cemetery on the night before a feast, the time being occupied in prayer.

Hence— The day and night preceding a festival; the eve or day before a festival; strictly, an eve which is a fast.

A wake.