Using the Time Set command resets the day to day 0 instead of just advancing to that time of day

Using the Time Set code (eg: "/time set 13000" to make it just barely nighttime) resets the day to day zero instead of just advancing to that time of day. I assume it's been like that for awhile but I'm only noticing now that the day is in the F3 menu.

What I expected to happen: Well if it's 2 hours after sunrise for example I would expect that telling it to set the time to noon (6000) would ADVANCE to noon not TURN BACK TIME to noon on the first day.