Supplementary Dates Configuration in SubAccounts

During March While  doing day begin in Sub accounts module a message appears. Most of the spms and supervisor firstly just ignore the message. The message is about configuring the Last working day of the March and First working day of April. If you ignore the message while day begin of next day this message also reappears. The solution for this error is
Log in as ---Supervisor
---Go to configuration
Select Supplementary Dates--
Current Year  2012
Last working day of March   31-03-2012
First Working day of April    02-04-2012
This will solve the error