time difference - beautify my code

[dd0s via Digitalmars-d-learn]

i got a date t described in seconds from 1.1.1970, and i want to 
check if the current time is further than 12 hours from the given 
time t. the following code works but it's super ugly =S

please give me some ideas how to make this code nicer :)
  private static bool sessionIsCurrent(long t)
  {
    DateTime dateTime = DateTime(1970, 1, 1) + 
dur!"msecs"(t*1000);
    DateTime curTime = DateTime() + 
dur!"hnsecs"(Clock.currStdTime());
    return (curTime - dateTime) < dur!"msecs"(1000*60*60*12);
  }

thx for your effort