This is October 2012's issue of Let's Find Out by Scholastic. (It has free access right now to all issues, I don't know for how long this will last.) This magazine ties in to items we see at night. If you scroll down you can see Printable Activity Pages (one is related to activities you do during the day and at night) and there is an online game to play where you sort items you see during the day and at night.
I looked at The Education Center for skill sheets. Once you sign up for a free membership and search for 'day and night' in My Mailbox you will find 9 different worksheets, minibooks, poems that relate to day and night.