I am not sure where to post this to get a timely response. I have one aspiring youth who racked up an entire season in a day on my SMP server. Is there a way to set the seasons day? If not, are the turnips able to grow in any season? I have tried to update HF-Calendar.dat but the server keeps overriding on launch, so this has to be stored in a config I can't find? Please help.

There should be /hf day and /hf season commands. But there is some mod that makes these not work, and knowing my luck I bet you have that mod.