Q: why does calendar automatically use gmt when entering an event time? I have Cupertino time zone selected everywhere.

When entering a new event onto the calendar on my iPhone 5C, I select a time (in my time zone - which is selected, as far as I can tell, in every place it appears as a choice). The event shows at the selected time and a second later the GMT time shows in parentheses underneath the event title. When I go to edit, the time appears as GMT. I can change it in the edit screen and it works, but how can I get it to automatically show the right time - as it has done until I installed the latest upgrade.

Thanks.