Document posting issue

Hello all,

When I tried to post a document in the open period of this month , its posting in the closed period of next month.For EX: CLosing date for book of accounts for every month is 25th and if i tried to post document on 25th of the same month , system is posting directly into next closed period i.e., next month which is a closed period.

FYI after 25th of every month every transaction will be considered as next month transactions.

Is there any solution to solve it.

Thanks inadvance.