vigil

noun

• 1a period of keeping awake during the time usually spent asleep, especially to keep watch or pray:my birdwatching vigils lasted for hours as he lay in a coma the family kept vigil
• a stationary, peaceful demonstration in support of a particular cause, typically without speeches.

• 2(in the Christian Church) the eve of a festival or holy day as an occasion of religious observance.
• (vigils) nocturnal devotions.