Imagine checking your phone and discovering a meeting you never scheduled. The calendar invitation claims your bank account has been compromised, a subscription payment failed, or someone made an expensive purchase using your credit card. There’s even a phone number or website where you can supposedly fix the problem. Before you click anything, consider this: You could be looking at a calendar invitation scam, a phishing tactic that uses your digital calendar to deliver fraudulent messages. Unlike suspicious emails that might land in your spam folder, malicious calendar invitations can appear alongside legitimate appointments, medical visits, and family reminders. That makes them particularly easy to overlook until an alarming notification appears on your phone. Here’s how these scams work, what warning signs deserve attention, and how to protect your personal information.