Last digit of the departmental number:

Selected time
0, 1 or 5 The selected time is one hour after the start of afternoon school
2, 3 or 6 The selected time is one hour after the start of morning school
4, 7, 8 or 9 The selected time is one hour before the end of morning school

For instance, 383 2449 typically that means it would be run for 11:00 am.