A router will put those lines into the display of show running-config (or show startup-config) if the router believes that it has authoritative (correct) time set. The router will believe that it has authoritative (correct) time if you have done the clock set command or if you have configured NTP and the router has success in establishing sync with an NTP server.
Your comment is correct about service timestamps to get the date into syslog instead of the log showing uptime (which is the default). But the original question was about including the date in the output of show running-config. I am not clear whether you intended your comment to be just about syslog (where it is accurate) or whether you intended it to apply to both syslog and show running-config (where it is not accurate).
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.