During what hours may liquor be served? Liquor may not be sold at an on-sale or off-sale retail licensed premise between the hours of 2:00 a.m. and 6:00 a.m. An on-sale retail licensee may not allow a person to consume spirituous liquor on the premises between the hours 2:30 a.m. and 6:00 a.m. [A.R.S. 4-244(15)(17)]