miksir

p.2 important too. WP is overwrite default timezone in scripts to UTC. So date === gmdate and work with UTC. But by the fact it’s not UTC 🙂 Example:

Moscow time is 20:00. Event time is 20:00. Timezone in WP admin interface settings – Europe/Moscow (it’s UTC+3). We are sending to google dates=20170930T200000Z/20170930T220000Z&ctz=Europe/Moscow (Z in time means UTC+0). As result we are getting event start at 23:00 UTC+3 (google think that event is 20:00 UTC+0 and convert to UTC+3 timezone).

We can’t use gmdate instead of date for get UTC time because internal timezone of script sets to UTC. For self I did quick fix just removing Z from both dates (like ates=20170930T200000/20170930T220000), and it’s work well. Other solution is to modify date using timezone from WP settings.