Squid

The date and time format for Squid is: epoch.optional_milli_secs.

Example: Date/Time Format

1237075200.240 2 172.16.6.39 TCP_NC_MISS/200 3058 GET
http://172.16.6.202:8082/Secure/Local/console/bcsstyle.css -
DIRECT/172.16.6.202 text/html content_filter_not_applied

The Squid time and date format is similar to the NetCache NetApp format. In this example, the time is always the first column, epoch seconds plus milliseconds.