@Ariel
Hi.
These logs are not from October. There was router restart, and it had couple of failed attempts to connect to operator, so it had no internet connection, and no way to adjust its time according to NTP server, so what is displayed is last "saved time".
After connection was established router automatically adjusted to current date/time.
Even if you clean the logs this type event is bound to happen in the future, if RUT will fail to establish the connection to operator couple of times after reboot, so deleting logs will serve little, to no purpose, in the long run, but if you still want to do that, please follow instructions posted by elturko in the answer post.
Best regards,
VidasKac.