This bug was easy to fix. I changed line 824 in pfod.cpp as follows ("1.0a9-Azurit"):
//sendSlider("t04", "Year ", robot->datetime.date.year, "", 1, 2020, 2013);
sendSlider("t04", "Year ", robot->datetime.date.year, "", 1, 2028, 2021); // HB 2021-01-26