Welcome to PMA Wednesday!
I would replace "sad" with stressed, tired and/or sick. At this point in the September, everyone is back in school. Some have been back for a month, and others just a week. Either way, chances are good you are either stressed, tired and/or sick. If not, you probably work with someone who is stressed, tired, and/or sick. I've already had a cold with a fever, but I get my flu shot on Friday. Remember to take care of yourself and each other.
Have a "Happy PMA Wednesday" and Happy Patriots Day! God Bless the USA!