diff --git a/src/calendar_manager.py b/src/calendar_manager.py
index 838c0161..69414abb 100644
--- a/src/calendar_manager.py
+++ b/src/calendar_manager.py
@@ -127,6 +127,8 @@ class CalendarManager:
             # Use display manager's small font for date/time and calendar font for summary
             datetime_font = self.display_manager.small_font
             summary_font = self.display_manager.calendar_font
+            logger.debug(f"Using datetime font: {datetime_font}")
+            logger.debug(f"Using summary font: {summary_font}")
             available_width = self.display_manager.matrix.width - 4  # Leave 2 pixel margin on each side
             
             # Draw date and time on top line
diff --git a/src/display_manager.py b/src/display_manager.py
index 57f9324c..92ad57eb 100644
--- a/src/display_manager.py
+++ b/src/display_manager.py
@@ -192,8 +192,10 @@ class DisplayManager:
             # Select font based on parameters
             if font:
                 current_font = font
+                logger.debug(f"Using custom font: {font}")
             else:
                 current_font = self.small_font if small_font else self.regular_font
+                logger.debug(f"Using {'small' if small_font else 'regular'} font: {current_font}")
             
             # Calculate x position if not provided (center text)
             if x is None: