This function will return the system time in UNIX epoch time (if tick type is 2)
or the time since the start of the current day in seconds if tick type is 1.
Passing 0 will make it return the server's tick, which is a measurement in
milliseconds used by the server's timer system. The server's tick is an
unsigned int which loops every ~50 days.

Just in case you don't know, UNIX epoch time is the number of seconds elapsed
since 1st of January 1970, and is useful to see, for example, for how long the
character has been online with OnPCLoginEvent and OnPCLogoutEvent, which could allow
you to make an 'online time counted for conviction only' jail script.