There is mail in your mailbox six days a week so let's take time out of our day to thank the mail person who is responsible for getting it there! Thank A Mail Carrier Day (also known as Thank a Mailman Day) is always observed on February 4th.
NATIONAL CREATE A VACUUM DAY. A space completely devoid of all matter is a vacuum. On February 4 of every year, we are challenged to create one. A vacuum is created when the pressure inside a space is lower than the pressure outside the space.
The word, vacuum comes from the Latin word vacuus, meaning empty or vacant, and is used by scientists to refer to a space that does not have any matter or where the pressure is lower than atmospheric pressure.