During this weekend, every job will give you event points, but it's likely you're talking about the PopGlam Around The World event that Simon called you about.
Usually, Simon will call you at the beginning of the weekend and ask you if you're interested in earning event points. You can choose yes to start the event right away, ask him to call back later, or say no. If you said no, you won't be able to earn the 40 points this weekend. If you ask him to call back later, he'll ring you up after 6 hours. If you say yes, the event will have already started, and you'll be automatically taken to a PopGlam studio to complete a photoshoot.