Stricter check on date for RTC time sync (#2582)

* More strict check on time

* Also update thermald
old-commit-hash: ff65dc1401

selfdrive/boardd/boardd.cc

@@ -56,7 +56,9 @@ struct tm get_time(){
 }
 
 bool time_valid(struct tm sys_time){
-  return 1900 + sys_time.tm_year >= 2019;
+  int year = 1900 + sys_time.tm_year;
+  int month = 1 + sys_time.tm_mon;
+  return (year > 2020) || (year == 2020 && month >= 10);
 }
 
 void safety_setter_thread() {

selfdrive/thermald/thermald.py

@@ -309,7 +309,7 @@ def thermald_thread():
     now = datetime.datetime.utcnow()
 
     # show invalid date/time alert
-    startup_conditions["time_valid"] = now.year >= 2019
+    startup_conditions["time_valid"] = (now.year > 2020) or (now.year == 2020 and now.month >= 10)
     set_offroad_alert_if_changed("Offroad_InvalidTime", (not startup_conditions["time_valid"]))
 
     # Show update prompt