Log your work schedule and refer back to it in case you ever forget or want to tell someone.
If you add friends, Class Times can answer these types of questions: "What time do you work?" "Do you work Wednesday?" "What classes are you taking?" "What time do you work on Tuesday?" "What time do you get out?" "Are you at work right now?"
Works hand-in-hand (integrated) with Class Times for those with class schedules; You can request friends from both apps and only have one.