I'm signing a rental agreement on Saturday at 10, the agent wants me to pay prorated for that particular day, I understand it is a business but shouldn't I only pay for the remaining 14 hrs. left for the day or is it completely legal to ask to pay prorated for the whole day

I'm signing a rental agreement on Saturday at 10, the agent wants me to pay prorated for that particular day, I understand it is a bussiness but shouldn't I only pay for the remaining 14 hrs. left for the day or is it completely legal to ask to pay prorated for the whole day

I live in California

Generally, pro-rated rents are done on a daily basis.