The time until reaching PM depends on the current time. For example, if it is now 4:13 AM UTC, the next PM would start at 12:00 PM (noon) UTC today. This means it is about 7 hours and 47 minutes until 12:00 PM today. To calculate the time until a specific PM hour, subtract the current time from that hour in 24-hour format. For instance, if aiming for 1:00 PM, convert it to 13:00 and subtract your current time to find hours and minutes remaining.