Is this a correct usage of "來日方長"? I want to say:


  You still have a long way to go, wish you have a memorable secondary school career


And here's my translation to Chinese:


  來日方長, 希望你有個難忘的中學生涯


I'm wondering if it is correct to use 來日方長 here?
It's based on your intention. 来日方长 usually used for the two situations, if you want to tell sb that 


There's still time to do sth  
Need not to hurry in doing sth now


现代汉语词典（第五版）：未来的日还很长，表示事有可为，或劝人不必急于做某事。