Check the shift patterns. It may be the start transaction is for the previous day.

Thanks Andy ,All  day types for that particular schedule have been defined with From Day set to

“ Current Date”  . So it is not caused due to schedule . It was resolved on its own.

Could be due to following :

When working with IFS time clock , Shop floor IFS Time clock Uses Client PC’s clock when the Network connection is broken. So periodically sync  PC client clock and network server clock is better to avoid such differences. Also  User should not be able adjust Date/Time properties of Client clock manually in order to avoid these sort of issues