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Umasweetypie said:
I sent my Application thru FedEx. Its not delivered yet.
Looks like Fed ex delivers it tomorrow.
Will my application be accepted by CIC on 31st December 2014 ?
or is it a holiday in Canada?

CIC is open and will be accepting applications on December 31st.
 
The last date for application submission for FSW 2014 is indeed 31st DEC 2014.
Here's the link: cic. gc. ca / english / department / mi / index . asp?expand=mi-gen#mi12
Scroll down to - Ministerial Instructions 15 (MI15) and go through the paragraph.

As aquaman0423 also mentioned, the April 2015 date is for "Processing" by CIC and not "Submission".