TIdDayTimeUDP = class(TIdUDPClient);

TIdDayTimeUDP is a TIdUDPClient descendant that implements a UDP-based variant of the DayTime protocol (RFC 867) as a client. In this protocol, a DayTime server sends the current day and time in a human readable format and is sometimes used for debugging. 

If you need a time-synchronization solution, we recommend that you use the Time protocol encapsulated by TIdTime, TIdTimeUDP, TIdTimeServer, and TIdTimeUDPServer.