Fiscal month issues - Sage 50

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Hello.  I am a newby to Sage City and am looking forward to learning and chatting and interacting with the group.  I do have to start with a question.  How can I change Fiscal Month Dates?  I have 2014 & 2015 open, 2014 dates are all correct, but for some reason, 2015 is off by what appears to be one day.  we work on a 4 week, 4 wk, 5 wk calendar for 12 months.  Weeks are always, Thursday thru Wednesday. So, the last week of the period must be a Wednesday and this is not the case currently for 2015.   Any thoughts or suggestions?  Much appreciated.

JD