Not Legal Advice: Lawful hours for retail sale of alcoholic beverages are from 6 a.m. to 2 a.m. of the following day.
In other words, it is unlawful to sell alcoholic beverages either by the drink or by the package, between the hours of 2 a.m. and 6 a.m. of the same day.
It is also unlawful for any person to knowingly purchase any alcoholic beverages between the hours of 2:00 a.m. and 6:00 a.m. (Section 25631)
ABC may further restrict the operating hours of licensed premises. Such restrictions may be imposed in the following situations:
1. If grounds exist for the denial of an application for a license or where a protest against the issuance of a license is filed and if ABC finds that those grounds may be removed by imposition of those conditions;
2. Where findings are made by ABC which would justify a suspension or revocation of a license, and where the imposition of a condition is reasonably related to those findings. In the case of a suspension, the conditions may be in lieu of or in addition to the suspension;
3. Where ABC issues an order suspending or revoking only a portion of the privileges to be exercised under the license;
4. Where findings are made by ABC that the licensee has failed to correct objectionable conditions within a reasonable time after receipt of notice to make corrections given pursuant to subdivision (e) of Section 24200.
On the day that a time change occurs from Pacific Standard time to Pacific Daylight time or back again to Pacific Standard time, "2 o'clock a.m." means two hours after 12 o'clock a.m. of the day preceding the day such change occurs. (Section 25631)
For more info about ARTICLE 2. Hours of Sale and Delivery of Alcoholic Beverages [25631 - 25633] visit Leginfo.legislature.ca.gov.