is it just over one day?
i guess you could animate the light (your sun) moving through the day. over maybe 1000 frames. then render on 2s or 4s. (type 1-1000x2 or 1-1000x4 in the frame list in your render settings) this will render every second or fourth frame. you could change this to get the look you want. i guess over 24hrs you would take a photo every 30 mins maybe, so work out how many frames you need for that.

after that in nuke set the read node to "nearest frame".