In our country 02.11 is working day this year, but 04.11 is weekend.

How about to set submission date to 05.11 for this jam?

I don't think it would be fair to all of the participants to change the submission date when we're near the end of the jam. The jam is 10 days long on purpose, to give everyone a better chance to find some time to participate vs. 2-3 day intensive jams.