To calculate how much longer until 12 PM, the current time is needed. According to the world clock data, the closest current UTC time is approximately 6:31 AM UTC. If the current time is 6:31 AM, the time left until 12 PM (noon) would be: 12:00 PM - 6:31 AM = 5 hours and 29 minutes. So, it will be about 5 hours and 29 minutes until 12 PM from the current time.