If you’re 21 or older and live in Washington state, you can smoke as much or as little marijuana as you want in honor of “420,” the worldwide weed holiday, which is tomorrow. But law enforcement agencies will be out patrolling Saturday as a reminder that you can’t get high and drive.

They’ll be conducting drugged and alcohol DUI emphasis patrols Saturday, April 20, from 4 p.m. through 2 a.m.

The marijuana and alcohol emphasis patrols on 420 are part of the Target Zero initiative, the Washington State Traffic Safety Commission’s plan for zero traffic related deaths and serious injuries by 2030.