handle early dates (< 100AD)

Author: William Becker

lib/types/textParsers.js

@@ -17,7 +17,11 @@ var parseDate = function(isoDate) {
       return new Date(isoDate);
     }
   }
-  var year = match[1];
+  var isBC = /BC$/.test(isoDate); 
+  var _year = parseInt(match[1], 10);
+  var isFirstCentury = (_year > 0) && (_year < 100);
+  var year = (isBC ? "-" : "") + match[1];
+
   var month = parseInt(match[2],10)-1;
   var day = match[3];
   var hour = parseInt(match[4],10);
@@ -37,6 +41,7 @@ var parseDate = function(isoDate) {
   var tZone = /([Z|+\-])(\d{2})?:?(\d{2})?/.exec(isoDate.split(' ')[1]);
   //minutes to adjust for timezone
   var tzAdjust = 0;
+  var date;
   if(tZone) {
     var type = tZone[1];
     switch(type) {
@@ -53,13 +58,18 @@ var parseDate = function(isoDate) {
     }
 
     var utcOffset = Date.UTC(year, month, day, hour, min, seconds, mili);
-    return new Date(utcOffset - (tzAdjust * 60* 1000));
+
+    date = new Date(utcOffset - (tzAdjust * 60* 1000));
   }
   //no timezone information
   else {
-    return new Date(year, month, day, hour, min, seconds, mili);
+    date = new Date(year, month, day, hour, min, seconds, mili);
   }
-
+  
+  if (isFirstCentury) {
+    date.setUTCFullYear(year);
+  }
+  return date;
 };
 
 var parseBool = function(val) {