Sorry, I couldn't find pricing data for that day. The closing price for the Dow Jones Industrial Average (DJI) on December 29, 1978 was $805.01. It was down 0.1% for the day. The latest price is $45,479.60.
DATE
OPEN
HIGH
LOW
CLOSE
December 29 1978
$805.96
$812.20
$800.50
$805.01
Daily pricing data for the Dow Jones Industrial Average dates back to 1/2/1950, and may be incomplete.