We face high volume transactions every day. Therefore during peak periods (weekends: Friday to Sunday, public holidays) or even promotion event like Time sale/Sampling, we will need a longer processing time to handle all orders to avoid confusion and misunderstanding, we process orders based on 24 hours basis. (On present day, we will process the previous day's order - 00:00hrs - 23:59hrs.) So therefore, on a normal basis, we will take 1-2 working days to process and send out your orders. Singpost themselves, take 1 day to process deliveries and 1-2 working days to deliver to your address.
So technically, delivery process will take at least 3-5 working days to reach you after payment confirmation.