sset Calendars End date change automatically to previous date

Problem Description

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I follow the normal steps for setup assets system:

1. In system control oldest date placed in service is 01-01-1992.

2. Fiscal year setup starts from 01-01-1992 - 31-12-1992 ends with 01-01-2017 - 31-12-2017.

3. I use calender suffix in defining calenders with 12 periods,

my problem when start entering periods the system change the end date automatically to 20-Dec and the next periods takes the next day of the first period,

please note that our HCM team work on Hijri Calender,

Thanks