When it is 4:20 (am or pm) and you don't have any weed to blaze, the closest thing would be to set a dandelion (common lawn weed) on fire. Dandelions are used for wishing. Therefore, a wish should be made at 4:20. These are generally more effective than 11:11 wishes, because marijuana actually has direct effects on people.
Person 1: it's 4:20, blaze it Person 2: Time to make a weed wish!