Back in those days there was a midnight curfew every day of the year, except for New Year's Eve.

(This was in villages close to the DMZ).

At about 11:45 pm ROK Army soldiers would set up a .50 caliber machine gun in the streets, get on a loudspeaker, and in Korean make an announcement;

GO BACK TO YOUR HOMES OR BE READY TO STAY WHERE YOU ARE. AT MIDNIGHT WE WILL FIRE THE .50 CALIBER AS A WARNING, ANYONE IN THE STREET AFTER THAT WILL BE ASSUMED TO BE NORTH KOREAN AND WILL BE SHOT.

It was really something to experience. 

Koreans would tell US solders that were new in country that tomorrow was New Year's Eve, real big deal and the soldiers would day of course it's a big deal it's New Years' Eve and the Koreans would say you don't understand.