For express orders such as 3rd day, 2nd day and Next Day it generally 24 hours for processing and handling which delivery would exclude the order date. For instance, if you place the order on Monday with 3rd Day prior to 12 am(PST), it will arrive on Thursday. Saturday & Sunday are non operational days for FedEx.
Please note: Express orders must be placed before 11 am Pacific Standard Time to be shipped the same day. Express orders placed after cut off time will be shipped on the next available business date. Delivery time excludes the date of order, so time would start the day after it's been shipped.