Swiping down on the left is the information side. Swiping down from the right is to access your shortcuts to settings So naturally the date would be in the information side It's part of the Android Operating system UI anyway the Google has designed
The standard setup makes complete sense. The time is on the left, so naturally the date should show when swiping from that side. Your connection icons are on the right side, so quick access settings are found from swiping here.