date - php mktime from variable -

i have variable this:

$event_start_date_hour_iso = str_replace(':',', ',$event_start_hour).', 0, '.date('d, m, y', $event_start_day);

the echo result of $event_start_date_hour_iso 11, 30, 0, 06, 02, 2016. if next:

echo date(date_atom, mktime($event_start_date_hour_iso))

the result 2016-02-06t11:48:08+02:00.

if do:

echo date(date_atom, mktime(11, 30, 0, 06, 02, 2016))

the result if correct:

2016-06-02t11:30:00+03:00

except +03:00, utc+2.

what doing wrong? how put data variable , right answer?

i'm not sure understand problem. think have inverted month , day in mktime function.

mktime(hour, minute , second, month, day, year);

Ben