The phrase "gloomy day" means a day that is dark, sad, and lacking in brightness, like when the sky is cloudy or it's raining.
Sentences with «gloomy day»
Having the walls painted in a crisp, clean shade will brighten the mood on gloomy days and become your blank canvas for accents to «pop». (dandelionpatina.com)
And with it, a tough forecast: many more dark, cold, gloomy days of winter until the first signs of spring, which seems pretty far away. (travelandleisure.com)
So finally, after many gloomy days, we had sun so I thought I better prep and get this one documented. (kneadtocook.com)