What time will it be in the UK when 8.00 eastern time?

To convert 8.00 eastern time to the equivalent time in the UK, you need to subtract 5 hours due to the time difference between the eastern time zone in the United States and the UK (UTC).

8.00 eastern time - 5 hours = 3.00 AM BST

Therefore, when it is 8.00 AM in the eastern time zone, it will be 3.00 AM in the United Kingdom.