Not Legal Advice: You can buy beer in Missouri from 9:00am to 12:00 midnight on Sundays and from 6:00am to 1:30am Monday through Saturday.
Laws that prohibit the sale of alcohol on Sundays are called blue laws. Missouri is one of eighteen states that have unrestricted alcohol sales, for closed containers of any kind. Alcohol in this state must be consumed off premises. Find out more at Restaurants.com.
All states prohibit providing alcohol to persons under 21, although states may have limited exceptions relating to lawful employment, religious activities, or consent by a parent, guardian, or spouse.
For more information about the laws in each of the 50 states and the District of Columbia, visit The Federal Trade Commission.
Check out the States With the Craziest Liquor Laws, featured at Time.