Edit /usr/local/etc/my.cnf
Add the following below [mysqld]
default-time-zone='+00:00'
Restart mysql with brew services restart mysql
mysql> SELECT @@system_time_zone, @@global.time_zone, @@session.time_zone;
+--------------------+--------------------+---------------------+
| @@system_time_zone | @@global.time_zone | @@session.time_zone |
+--------------------+--------------------+---------------------+
| EDT | +00:00 | +00:00 |
+--------------------+--------------------+---------------------+