The camera was shooting on RAW f6.3 iso 100, on aperture priority mode. So the exposure time was up to the camera, much shorter during the day than at night.
I assume at night with the low iso and smaller aperture, camera had to go to the max time which is 30 sec.
Each frame was taken every 15 min for about 24 hours, then I narrowed it down to 30 frames for WeGIF.