I'm not sure if he hangs out here much these days, but bbraun programmed a control panel a few years ago called SetDate, which can set the date on our old Macs past 2019.

The thread and link are here. https://68kmla.org/forums/index.php?/topic/16380-idea-for-programmers-2019/?hl=setdate&do=findComment&comment=162858