This is one of those days when you need to treat just about everyone you encounter with kid gloves. If you take care when dealing with others, you will reap huge rewards: either in terms of good will, or in terms of gratitude. There are many fragile egos around you today and they are attached to some people who have powerful ties. So making friends and making people happy should be your number one goal. You won't regret expending the extra effort it requires.