Custom measure calculation taking 2014 as leap year

Hi,

We have copied custom measure from one environment to other environment.

In source environment the calculation in custom measure for "Average daily balance Periodic" working fine.

Here it is considering 28 days for Feb2014.But in target environment,it is considering 29 days for Feb2014.

Time dimension members and properties  are same in both the environments.

The issue is with Only Feb month.

Any other settings we need to look for new environment/Model?

Thanks,

Manohar