Below is a list of the archive time options available
Custom Allows you to set a time and weekdays to activate the archiving.
Monthly Activates the archive at midnight on the last day of the month. (July 31 at Midnight)
Weekly Activates the archive at midnight each Sunday.
Daily Activates the archive at midnight each day.
Hourly Activates the archive at the end of each hour.
Setting the UTC option will cause the activation time to be tested against UTC time.
Definition of midnight
The midnight archives are activated at 00:00 which is in fact the beginning of the next day. The date used in the time stamp is adjusted to the previous day. This ensures that the whole day is captured in the archived files.
When using the "Hourly" archive option, the appended date stamp part of the file name will contain a value from 01 to 24 indicating the hour that the archive was created.
Example "C:\Program Files\Syslogd\Dated Syslogs\MyLogFile2005-02-27-24.txt"
The format of the datestamp is YYYY-MM-DD-HH, where HH is a value from 01 to 24