Years ago, 123.45 was used as the (non official)international chit-chat frequency. In some countries, small airfield use it so they do not have to apply for an expensive licence.
123.45 did not have any official allocation, and therefore people used it for "casual chats". I wonder where we now stand from a legal point of view. Anyhow, it is still being used to pass on personnal messages.
Merry Christmas everyone