With the following form you can interact with the SAS task cifbuild. Only two parameters of that task are of relevance here: the observation date and the analysis date. Both have the following format: yyyy-mm-ddThh:mm:ss. The string now is also a valid date.
The observation date is available in sereval places, one of these is in the ODF constituent rrrr_oooooooooo_SCX00000SUM.ASC. For example:
0092970701 / Observation/Slew Identifier
0269 / Revolution number
2001-05-29T17:16:58 / Scheduled Start Time <-- Use this date
2001-05-29T20:47:05 / Scheduled Stop Time
The analysis date will in general be now, but can also be any other date. You should read the documentation of the task cifbuild for more details.
Questions regarding the CCF should be addressed to the XMM-Newton Helpdesk.