Mark the ‘high’ holiday: 15 things to do in Seattle this week

Let’s help you make some plans. The ‘high’ holiday 4/20 is Thursday, you can learn to master the Mason jar on Tuesday, and come Saturday, thousands of Seattleites will be marching for science.

Note: A event originally scheduled for Sunday, “Caucasians Anonymous,” has been postponed. No new date has been set.