QR Code Types Explained

캘린더 이벤트 QR Code: 스캔으로 일정 추가

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Encoding iCalendar VEVENT data in QR codes: date/time formatting, time zones, recurring events, and cross-platform testing.

  
  

    
  








  
  

    
    
      
      
  1. 
        Calendar Event QR Codes: Add Events With a Scan
      
    2. 
      
      
  2. 
        The iCalendar VEVENT Format
      
    3. 
      
      
  3. 
        Date and Time Formatting
      
    4. 
      
      
  4. 
        Supported Fields
      
    5. 
      
      
  5. 
        Size Considerations
      
    6. 
      
      
  6. 
        Cross-Platform Testing
      
    7. 
      
      
  7. 
        Use Cases
      
    8. 
      
      
  8. 
        Key Takeaways
      
    9. 
      
    

  









  
  

  
  

    
    

      
Calendar Event QR Codes: Add Events With a Scan


Calendar QR codes encode event details using the iCalendar VEVENT format. When scanned, the device creates a calendar entry with the title, date, time, location, and description pre-filled.


The iCalendar VEVENT Format


BEGIN:VCALENDAR
BEGIN:VEVENT
SUMMARY:Team Meeting
DTSTART:20260315T100000Z
DTEND:20260315T110000Z
LOCATION:Conference Room B
DESCRIPTION:Quarterly planning session
END:VEVENT
END:VCALENDAR



Date and Time Formatting


iCalendar uses a specific date-time format:


    

  • UTC: YYYYMMDDTHHMMSSZ (Z suffix indicates UTC)
    • 

  • Local: YYYYMMDDTHHMMSS (no suffix — uses device's timezone)
    • 

  • With timezone: TZID=America/New_York:20260315T100000
    • 



Recommendation: Use UTC format for events with attendees in multiple time zones. Use local format for location-specific events where everyone is in the same timezone.


Supported Fields






Field
Description
Required






SUMMARY
Event title
Yes




DTSTART
Start date/time
Yes




DTEND
End date/time
Recommended




LOCATION
Venue or address
No




DESCRIPTION
Event details
No




URL
Link to event page
No




RRULE
Recurrence rule
No






Size Considerations


A basic calendar event (title, start, end, location) is approximately 150-200 bytes. Adding a description and recurrence rule can push past 300 bytes. Keep events concise to maintain a scannable QR code at reasonable version.


Cross-Platform Testing






Platform
Behaviour






iOS
Opens Calendar app with pre-filled event for saving




Android
Opens Google Calendar or default calendar app




Outlook
Recognised when shared via file, limited QR support






Calendar QR codes are less universally supported than URL or WiFi types. Always test on target devices.


Use Cases


    

  • Conference sessions: Attendees scan to add talks to their calendar
    • 

  • Event tickets: Include the event date, time, and venue
    • 

  • Meeting invitations: Physical signage in offices for recurring meetings
    • 

  • Promotion deadlines: "Sale ends March 31 — scan to set a reminder"
    • 



Key Takeaways


    

  • Calendar QR codes use the iCalendar VEVENT format
    • 

  • Date-time format is critical — UTC (Z suffix) is safest for multi-timezone
    • 

  • Keep event data concise to maintain a reasonable QR code size
    • 

  • Cross-platform support is good but less universal than URL QR codes
    • 

  • Include SUMMARY and DTSTART at minimum; DTEND and LOCATION recommended
    •