Calendar Events Inside a QR Code
An event QR code stores a small calendar file directly in the pattern. The payload follows the iCalendar VEVENT format defined in RFC 5,545, the same standard that Google Calendar, Apple Calendar, and Outlook already understand. When someone scans the code, their phone reads the embedded title, start and end times, location, and description, then offers to add the event with a single tap. Because the data lives in the code itself, scanning works without an internet connection. There is no link to a server and no page to load, so the event appears even when a guest stands in a venue with weak signal. This makes the format reliable for printed material such as posters, tickets, and invitations, where you cannot count on every reader having data coverage. The tool builds a valid VEVENT for you, so the structure stays correct across the widest range of devices, and you never edit the raw calendar text by hand.