Mail sent 2017 years ago

Bizarre. What does the date on the email say (in the log) ?

The proper date.

And the time is correct as well? What is your time zone setting?

Another person reported seeing nothing for the ‘ago’ value. It’s my first time using the WordPress human_time function.

I see the source code has a filter.. You might have a plugin or theme that’s modifying this function.

return apply_filters( 'human_time_diff', $since, $diff, $from, $to );

Says “2017 years ago.”

Time and date on header is fine.

WP timezone is set to New York
UTC

Could you post your info from the plugin’s Diagnostic Data menu.