My Inkyphat display + Rpasberry Pi Zero WH combo has now been happily running since January 21st. Every minute it displays the date and time, 24 hours a day, 7 days a week. Every 15 minutes it interrogates my Pi-powerd NTP server and displays the high-precision time in red.
According to an online duration calculator, that’s 283,650 updates/display updates! I’ll keep it running for as long as I can, but really, the display is an amazing piece of kit and well worth it!