Suddenly all metar pop-ups, old or new, show a date of 1-1-1970 UTC and an error message when error reporting is on.
And you are the first to notice it? Thanks 
First make a copy of the current script and please test this version,
Wim
P.S. “Is this a CheckWX problem” => yes
The date field in the json file now contains something more then the expected string:
"observed":"17-02-2019 <span class=\"tx-light tx-12\">@<\/span> 11:00Z",
metar_popup.php.zip (7.11 KB)