Maybe? I don't know?? It has been quite a while, after all but I think it was the sun that made the sky appear so blue and everything looked so lovely. It was a bit brisk out but boy! The sunshine really improved my mood!
I think it's going to stick around for the weekend, and I will uncover some plants to let them drink in the warmth and photosynthesis, let the greenhouse warm up naturally, then watch the sun go back into winter-hiding.