BClocks contains 24 different styles that represent analog clocks. Each clock shows an AM/PM indicator on the lower half of the dial.
By default, a sun revolving clockwise around the earth appears as AM/PM indicator. A yellow sun on the upper hemisphere indicates the day and a blue sun on the lower hemisphere indicates the night. As long as the sun is visible on the left half of the globe, the clock is showing a time before midday (AM) and if the sun is visible on the right side, the clock is showing a time after midday (PM).
Instead of the sun, you can also set a small digital clock at the same place on the dial. To achieve this, open the BClocks menu using the RIGHT mouse button and click then "Options" > "Clock design" and select the type of AM/PM indicator that you like.