Night sky over Ottawa on 25 October 2026

This page lists sunset, twilight and darkness times for Ottawa, Canada, for the night of 25 October 2026. All times are local (EDT, UTC-4).

Astronomical darkness begins when the sun is 18 degrees below the horizon. That is when the faintest stars, galaxies and nebulae become visible. Before that, the sky passes through civil and nautical twilight, when only bright stars and planets show. Ottawa lies at 45.41° N, 75.70° W, and the length of full darkness there changes through the year.

The moon also affects how dark the sky gets. A bright moon washes out faint objects, while a thin crescent or a new moon leaves the sky dark. On this night the moon phase is Full Moon, with 100 % of the disc lit. Check both the darkness times and the moon data below before you choose targets for the night.