CHANGES in tzinfo-0.2.0 vs CHANGES in tzinfo-0.2.1

@@ -1,4 +1,29 @@
+Version 0.2.1 (tzdata v2006d) - 17-Apr-2006
+-------------------------------------------
+
+* Fix a performance issue caused in 0.2.0 with Timezone.local_to_utc. 
+  Conversions performed on TimeOrDateTime instances passed to <=> are now
+  cached as originally intended. Thanks to Michael Smedberg for spotting this.
+* Fix a performance issue with the local_to_utc period search algorithm 
+  originally implemented in 0.1.0. The condition that was supposed to cause
+  the search to terminate when enough periods had been found was only being
+  evaluated in a small subset of cases. Thanks to Michael Smedberg and 
+  Jamis Buck for reporting this.
+* Added abbreviation as an alias for TimezonePeriod.zone_identifier.
+* Updated to tzdata version 2006d
+  (http://article.gmane.org/gmane.comp.time.tz/936).
+* Ignore any offset in DateTimes passed in (as is already done for Times).
+  All of the following now refer to the same UTC time (15:40 on 17 April 2006). 
+  Previously, the DateTime in the second line would have been interpreted 
+  as 20:40.
+  
+    tz.utc_to_local(DateTime.new(2006, 4, 17, 15, 40, 0))
+    tz.utc_to_local(DateTime.new(2006, 4, 17, 15, 40, 0).new_offset(Rational(5, 24)))
+    tz.utc_to_local(Time.utc(2006, 4, 17, 15, 40, 0))
+    tz.utc_to_local(Time.local(2006, 4, 17, 15, 40, 0))
+
+
 Version 0.2.0 (tzdata v2006c) - 3-Apr-2006
 ------------------------------------------
 
 * Use timestamps rather than DateTime objects in zone files for times between
   1970 and 2037 (the range of Time).