function.php
<?php
$launcher_year = get_post_meta(get_the_ID(), "year", true);
$launcher_month = get_post_meta(get_the_ID(), "month", true);
$launcher_day = get_post_meta(get_the_ID(), "day", true);
wp_localize_script("main-jquery-js", "datedata", array(
"year" => $launcher_year,
"month" => $launcher_month,
"day" => $launcher_day,
));
main.js
var countDown = function () {
console.log(datedata);
simplyCountdown('.simply-countdown-one', {
year: datedata.year,
month: datedata.month,
day: datedata.day
});
};