With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cuicEventTimestamp
Cisco Unified Intelligence Center Event Timestamp
1.3.6.1.4.1.9.9.718.1.11.7
The event time stamp object specifies the date and time that the notification was generated on the originating device.
Back to CISCO-CUICAPPS-MIB MIB page.
IPHost Network monitor allows you to monitor cuicEventTimestamp on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.