For validating of such I use SCU0 as follows:
Trigger SCU0 for client comparison calendars (sample case):
- Select ‘SAP Reference IMG’ and press ‘Create’
- In ‘Selection by’ pop-up choose ‘Select activities’
- In IMG selection tree drill down to ‘Maintain Calendar’, select it and press Enter
- Give description for the comparison run, select R/3 connection as Your Production environment and press ‘Full Comparison’
- In the outcome, ‘red #’ shows the differences between the selected environments and to see the actual difference set cursor to required line (i.e. to table TFACD), press ‘Comparison’ and in a coming pop-up press ‘No’
- Many of the tables tent to have a lot of entries so to see the difference only You may want to use Filter-button and untick ‘Identical’ option