The Let's Encrypt status page will no longer be updated with maintenance windows for updates to the Boulder source code (ACME API components).
We often recommend folks subscribe to our status page to get updates on maintenance and incidents affecting the Let's Encrypt infrastructure. For many years, that included a maintenance window and notifications for planned updates to the Boulder source code. Over the last few years, we've made improvements so that type of maintenance event is non-impactful to users. As a result, we are discontinuing those status page maintenance windows and notifications. We will continue to use our status page to inform subscribers about maintenance that may impact our service availability and incidents/outages that occur.
If you're still interested in seeing what build/version of Boulder is running in our staging or production environment, you can query the /build endpoint like so and correlate the information to our tagged releases.
$ curl https://acme-v02.api.letsencrypt.org/build
Boulder=( +99dcb9a5 Tue May 31 23:12:51 UTC 2022)