Will my package arrive here Sunday?

I ordered a Violin from Shanghai China through the seller Yitamusic, on ebay. They shipped through EMS and switched over to USPS, on the USPS track and confirm it said it left the Mcallen Facility on the 15 (today, Sunday) at 1:42 AM. I looked around in the USPS website, and it said that some packages deliver on Sunday. I was wondering if my package would arrive on Sunday?