From a technical perspective timezone is a "nice to have" not "must have" function. The OS runs exactly the same on UTC as it does with one configured. There is also no need to define NTP servers; we fallback onto pool.ntp.org servers by default so as long as the network is functional, devices like RPi boards with no hardware RTC chip will have time corrected during boot.
NB: Adding a timezone setup option in the wizard would be great. Our all-volunteer project staff working for fun in their free time looks forward to reviewing your contribution on GitHub to make that possible.