Google Core Update History: https://status.search.google.com/summary

About the August, 2023 Core Update: https://status.search.google.com/incidents/nBtYtBeex4GYBbdDS2LX

Google Completes Rollout Of August 2023 Core Update: https://www.searchenginejournal.com/google-completes-rollout-of-august-2023-core-update/495802/