Today at 1:45 pm the temperature inside my cold frame hit a high of 44.1*F (6.7*C)!!! Outside high was only 26*F (-3.3*C). Grow spinach, grow.
Yesterday, I wrote myself a note on my kitchen black board to remember to pull the tarp off my frame in the morning and replace it in the evening. I followed the note today. The sun is still having trouble emerging from behind the neighboring house much of the day. But at 12:00 it hits the cold frame, and from then on the frame gets full sun.
I forgot to put some snow inside the cold frame to water the plants. A task for tomorrow.