I just don't know if this is helpful but;
all you need to do is go inside your house then go to the blue book(or notebook..or book) face it then press X. After that you will see the following choices: -sleep without making any dairy entry...-make a diary entry then sleep...-read diary...and the other one that let's u cancel. if u wanna save pick the 2nd one(make a diary entry then sleep) if u just wanna move to the next day w/o saving press the 1st one(sleep without making any diary entry) if u wanna load ur last saved game press da 3rd one(read diary)

I HOPE THAT HELPS!!! GUD LUK ANYWAYZ..
THANKEES!!!

first go to your house and then beside your bed there is a blue book and press X