how to query sar(sysstat) for more than one day data points

1. I don't see 'sar' command accepts date-and-time as starttime(-s) or endtime(-e) than just time. So, how to query 'sar' for more than one day's data point with older date and times(-f not going to help here). The output of the 'sar' command should have date value too as well for the data points - instead of just time in hours and minutes. 2. I see sysstat splitting pa data files per day-wise. Is it ok to modify the default sysstat cron entries to collect sysstat(sa1/sa2) data in a single pa file per week. sysstat config: cat /etc/sysconfig/sysstat # sysstat-9.0.4 configuration file. # How long to keep log files (in days). # If value is greater than 28, then log files are kept in # multiple directories, one for each month. HISTORY=7 # Compress (using gzip or bzip2) sa and sar files older than (in days): COMPRESSAFTER=10 # Parameters for the system activity data collector (see sadc manual page) # which are used for the generation of log files. SADC_OPTIONS="-S DISK" sysstat cron entries: cat /etc/cron.d/sysstat # Run system activity accounting tool every 10 minutes */10 * * * * root /usr/lib64/sa/sa1 1 1 # 0 * * * * root /usr/lib64/sa/sa1 600 6 & # Generate a daily summary of process accounting at 23:53 53 23 * * * root /usr/lib64/sa/sa2 -A