Here's a symbol for which the row giving the date corresponds to a regular session bar: https://www.google.com/finance/getprices?i=60&p=1d&f=d,o,h,l,c,v&df=cpct&q=AA-
EXCHANGE%3DNYSEMKT
MARKET_OPEN_MINUTE=570
MARKET_CLOSE_MINUTE=960
INTERVAL=60
COLUMNS=DATE,CLOSE,HIGH,LOW,OPEN,VOLUME
DATA=...