The way the scheduled dumps work in CA Directory is that you need to calculate the start time and period from Sunday midnight GMT and put that in the command as the number of seconds that have elapsed.
For example, the following command takes a snapshot copy of the datastore every night at 3 a.m. in a GMT+10:00 time zone:
dump dxgrid-db period 61200 86400
We need to change this to make it easier to just enter the time in local timezone format and let the software do the calculations instead. In this day and age, it seems ridiculous to ask users to use the above format.