1. SQL -> pcETL_xxx -> Programmability -> Stored Procedures
2. Right click on spIU_0000_Time -> Execute Stored Procedure...
3. Fill in the new StartYear -> OK button
4. Login Modeler -> Time dimension -> Hierarchy tab -> it shows up from year 2010 instead from 2012 (earlier).
If you want to do the same for TimeDay dimension, then execute stored procedure spIU_0000_TimeDay.