Quick RES GS question: your schedule is X-X-R-... when you get a 3-day GS. Day-1 is a DH, day-2 is 8-hour fly and day-3 is DH home. (first two are on X-days)

Since DH is credit, and credit pays at the end of the trip (a RES day) does that mean I just worked the day-1 DH for free?