This report uses combined 2002 to 2013 National Survey on Drug Use and Health (NSDUH) to assess the average number of full-time college students aged 18 to 22 using substances for the first time per day for the year as a whole and for each month of the year. Substances examined include alcohol, cigarettes, cigars, marijuana, nonmedical use of prescription pain relievers, nonmedical use of prescription tranquilizers, nonmedical use of prescription stimulants, nonmedical use of prescription sedatives, inhalants, hallucinogens, and cocaine. Results are shown for each substance by month.