Will I be charged to set an end time during free selling promotion?

Hi I have a  question  regarding  fees  with   selling  during  this  free  selling  period   March to   April.  If I need to choose  a   finish time  for selling something  will this be free or will I be charged?  I wish to  sell something with a finish time in the evening  but I work evenings and dont finish till 11 15pm. I dont  want to  start a  listing this late  but  wonder  if I do and can choose an earlier   finish time will I be charged?  Can someone help with my query please?