[tor-relays] Configuring key expiration warning messages?

Hi everyone,

I'm using OfflineMasterKey 1 for my Tor bridge, hosting and renewing the long-term identity key on a Tails USB stick.

I observed that Tor starts printing warning messages to /var/log/tor/notices.log 24 hours before the intermediate key expires. My question is if there is a flag that could be set in the torrc file to start printing these warning message more than 24 hours before the expiration time, possibly even with outputting the exact expiration time? If there isn't such an option, does anyone happen to have a script ready for this (before I start trying to implement something like this myself)?

Kind regards telekobold