Our old oven, a posh kiwi Fisher & Paykel, which the landlord removed as part of a general refurb, had an arcane button sequence to reset the clock. The new one, a cheapo Beko, has reset automatically, so I guess it's got some internet connection somewhere. Probably it's sending a record of all our cooking back to Beijing and/or Cupertino. But the new oven is a bit crap at cooking. It also claims that if the clock is not set, it will not do any oven duties, which is pointless and stupid and crap, if true.
Meanwhile the microwave (which, in contrast to the oven, is a Bosch) does not auto-reset but is easy to reset via a clock-icon situated between "start" and "stop" (which are written as words, so FOREIGNS just have to learn ENGLISH or, erm, use the oven) and a friendly round twiddly knob.