It seems to me that Nordic has implemented only a part of the Current Time Service. I want to get the time zone in addition to the year, month, day, hour, minute, second, but I can't find a timezone in day_date_time_t. Looking at the diagram from the Bluetooth SIG page with a partial specification of the CTS, it seems like the profile as prescribed by the standard actually has the missing timezone information.
Specifically in this case, I want to get the timezone from the Current Time Service as offered by iOS without writing a characteristic from an app, but by the nRF5 being a client to iOS being a server (iOS itself without any apps is a Current Time Service server).