What is the size of the garrison flag and when is it flown?

The garrison flag is indeed 38 feet by 20 feet in size, and it is specifically used for display on holidays and important occasions. The use of the garrison flag serves to honor the significance of these events, showcasing a large and prominent symbol of pride and patriotism. It's a substantial flag that makes an impressive visual statement, representing the values and traditions of the military.

On the contrary, the other options describe flags that are either different sizes meant for specific situations, such as inclement weather or daily display, or inaccurately attribute the size and purpose to the garrison flag. For instance, the storm flag is smaller and used in adverse weather conditions, while the other options refer to flags that may be used for everyday military ceremonies or duties, which do not match the context of the garrison flag's intended use on significant occasions.