The time-stamp record consists of a standard 24-byte header plus 16 bytes that are reserved for system use. The system date and time fields are at offsets 8 and 12. These fields are updated at preset intervals, to keep the date and time current.
The recording routines take the current date and time from the time-stamp record and put them in the system date and time fields of the IPL record header.
The current date and time information in an IPL record allows you to measure the interval between system termination and reinitialization.