MySQL Error!
MySQL error in file: /engine/modules/calendar.php at line 208
Error Number: 1055
The Error returned was:
Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'alaalem_old.joy_post.date' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
SQL query:

SELECT DATE_FORMAT(date,'%b %Y') AS m_date, COUNT(id) AS cnt FROM joy_post WHERE approve=1 AND date < '2018-02-20 18:28:20' GROUP BY m_date ORDER BY date desc