It’s unclear whether or not Hypnotic Pattern performs at nighttime. As published, It will be up towards your DM to determine. Personally, I would rule that the Hypnotic Pattern is manufactured of light as it's an illusion and would, as a result, be seen in the dead of night. Sure, https://holdenatgsg.bloggadores.com/33553055/little-known-facts-about-patron-hipnotico