Looks like the UTC time stamp is the syslog writing it instead of the php.ini.
I’ve noticed another message in the log related to events, it gives a huge out put of client information so I’m only including the start of it:
wordpress database error got a packet bigger than ‘max_allowed_packet’ bytes for query insert into ‘wp_postmeta’ (post_id’, ‘meta_key’, ‘meta_value’) values (28950, ‘_transient_tribe_attendees’…..