Events that occur within an app container are logged within that container. These include cron.log, access.log, error.log... Depending on the type of the log file you need, you can open your logs using different CLI commands or open after you SSH into your app container.
For example, to access your cron logs on the main environment with the CLI, run:
platform log cron -e main
Timezones
UTC is the default timezone for all logs.
For more information on this feature, please see the following page in the Platform.sh documentation:
https://docs.platform.sh/increase-observability/logs/access-logs.html#container-logs