Set min/max year based on platform limitations 1901...2100.

src/utils/date.js

@@ -23,6 +23,9 @@ const monthAbbr = [
   'nov',
   'dec',
 ]
+// Calendar year bounds (used instead of config.min_year / config.max_year)
+const MIN_YEAR = 1901
+const MAX_YEAR = 2100
 
 // Core helpers ------------------------------------------------------------
 /**
@@ -320,6 +323,8 @@ function formatTodayString(date) {
 export {
   // constants
   monthAbbr,
+  MIN_YEAR,
+  MAX_YEAR,
   DEFAULT_TZ,
   // core tz helpers
   makeTZDate,