Prevalence (%) of alcohol use by week day and month

	NVDRS	NESARC	BRFSS 2010
Sunday	37.6	19.7
Monday	32.1	15.6
Tuesday	32.1	15.5
Wednesday	32.1	16.5
Thursday	32.5	16.0
Friday	33.2	15.6
Saturday	37.7	18.0
January	34.3	15.5	19.0
February	32.4	17.7	18.7
March	31.9	14.3	17.9
April	33.0	14.8	18.9
May	33.5	--	18.9
June	34.1	--	18.6
July	36.4	--	19.3
August	36.8	16.1	19.6
September	34.3	16.3	19.5
October	32.5	17.1	19.2
November	33.2	16.3	20.1
December	33.1	16.5	18.6

Alcohol use refers to suicide decedents in the National Violent Death Reporting System (NVDRS) with a positive BAC (>0.0g/dl). In the National Epidemiologic Survey on Alcohol and Related Conditions (NESARC), monthly drinkers (living subjects) were asked, “How long has it been since you last drank?” and classified into one of two groups: “reported drinking the day of or up to 48 hours prior to the interview” or “did not drink the day of or up to 48 hours prior to the interview.” In the 2010 Behavioral Risk Factor Surveillance System (BRFSS), respondents were asked “during the past 30 days, how many days per week or per month did you have at least one drink of any alcoholic beverage” and classified as those who drank at least once a week versus non-weekly drinkers relative to the month of interview.