When is the United States flag required to be displayed from 0800-1800?

The requirement to display the United States flag from 0800 to 1800 applies specifically to the period from April 1 to October 1. This timeframe coincides with the months when daylight hours are longer, allowing for the appropriate and respectful display of the flag during daylight. The flag should be displayed prominently in good weather conditions, hence the alignment with these months emphasizes the importance of visibility and proper etiquette associated with the flag's display during times when it is easily seen and appreciated by the public.

The other options either suggest periods that do not align with standard flag etiquette or do not take into account the variations in daylight hours throughout the year, thus reaffirming that April to October is the appropriate time for flag display during the specified hours.