[t_curmudgeon]

Unless you are currently 75 years old, there isn't much chance of that. The solar cells and the ESP module probably have a lifespan measured in years, not decades.

Not even electronics built in the "good old days" of low component count circuits and hand-wired cabinets lasted more than a few decades.

Cheap flash memory, material diffusion effects, etc, will kill modern stuff much quicker. Not to mention WiFi becoming obsolete. And unlike your family's old mechanical clocks, once a part becomes unavailable, you can't make your own replacement.

Take pictures and print them instead!