The start times are 6pm and 8:30 pm eastern.
They had to wait for GSW game to be over to decide whether using two networks, is my guess. Since both games are in eastern timezone, this is only choice to show both 'full'. It happens over the years...
Couple of examples, although they could have pushed the central games back to 9:30 as well...
[TABLE="class: suppress_glossary sortable stats_table now_sortable"]
<tbody>[TR]
[TH="class: left, align: left"]
Wed, May 4, 2005[/TH]
[TD]6:00 pm[/TD]
[TD="class: left"]
Washington Wizards[/TD]
[TD="class: right, align: right"]112[/TD]
[TD="class: left"]
Chicago Bulls[/TD]
[TD="class: right, align: right"]110[/TD]
[TD="class: center, align: center"]
Box Score[/TD]
[TD="class: center, align: center"][/TD]
[TD="class: left"][/TD]
[/TR]
[TR]
[TH="class: left, align: left"]
Wed, May 4, 2005[/TH]
[TD]8:30 pm[/TD]
[TD="class: left"]
Denver Nuggets[/TD]
[TD="class: right, align: right"]89[/TD]
[TD="class: left"]
San Antonio Spurs[/TD]
[TD="class: right, align: right"]99[/TD]
[TD="class: center, align: center"]
Box Score[/TD]
[TD="class: center, align: center"][/TD]
[TD="class: left"][/TD]
[/TR]
[TR]
[TH="class: left, align: left"]
Thu, May 5, 2005[/TH]
[TD]8:30 pm[/TD]
[TD="class: left"]
Dallas Mavericks[/TD]
[TD="class: right, align: right"]83[/TD]
[TD="class: left"]
Houston Rockets[/TD]
[TD="class: right, align: right"]101[/TD]
[TD="class: center, align: center"]
Box Score[/TD]
[TD="class: center, align: center"][/TD]
[TD="class: left"][/TD]
[/TR]
[TR]
[TH="class: left, align: left"]
Thu, May 5, 2005[/TH]
[TD]6:00 pm[/TD]
[TD="class: left"]
Boston Celtics[/TD]
[TD="class: right, align: right"]92[/TD]
[TD="class: left"]
Indiana Pacers[/TD]
[TD="class: right, align: right"]89[/TD]
[TD="class: center, align: center"]
Box Score[/TD]
[TD="class: center, align: center"]OT[/TD]
[/TR]
</tbody>[/TABLE]