10-4 Day – Copy That! A well known 10 Code used widely everywhere. #10-4 #TenFour
Ten Codes are used with emergency personnel like Police, Fire, Paramedics, Etc. Even the military too. The most common one is 10-4. As you guessed it this day is held annually on October 4. Since October is the 10th month. (Did you know it use to be the 8th month?).
Even Taxi Drivers, Bus Drivers, Commercial Drivers use 10-4 too.
10-4 Can mean Copy That, Heard You, It is just a form on acknowledgment via the radio, a walkie-talking type of communication. This Day is also known as National CB Radio Day.
The first 10-4 Day was in October 4, 1978 and was done by a proclamation by President Jimmy Carter. So this year, 2018, marks the 40th anniversary.