fix(dateFromFields): day light saving compensation

It now compensates for the difference between day light saving offset at epoch date verse day light saving offset now.
test(CreateTests): Now filters out tests not in current time zone so no errors appear any more for other time zones. This does mean that to get clean bill of health for tests they need to be run in 3 time zones at least.  Sydney, Brisbane, NewFoundland

elm-package.json

@@ -1,5 +1,5 @@
 {
-    "version": "7.2.0",
+    "version": "7.2.1",
     "summary": "Date Extra library add/subtract/diff/format etc dates.",
     "repository": "https://github.com/rluiten/elm-date-extra.git",
     "license": "BSD3",

src/Date/Extra/Create.elm

@@ -42,18 +42,20 @@ epochDate = Date.fromTime 0
 
 
 {- The TimezoneOffset of epochDate in current vm.
+Return is negated to match sign of getTimeZoneOffsset
 
 Y/M/D comes out 1969-12-31. The date time zone offset is negative hours minutes
 Y/M/D comes out 1970-01-01. The date time offset is positive hours minutes
+
 -}
 epochTimezoneOffset =
   let
     inMinutes = (Date.hour epochDate * 60) + Date.minute epochDate
   in
     if ((Date.year epochDate) == 1969) then
-      inMinutes - (24*60)
+      -(inMinutes - (24*60))
     else
-      inMinutes
+      -inMinutes
 
 
 {-| Create a date in current time zone from given fields.
@@ -73,12 +75,27 @@ dateFromFields year month day hour minute second millisecond =
     (Internal.ticksFromFields year month day hour minute second millisecond)
 
 
+{-
+This now compensates for current timezone offset compared to epoch offset.
+In relation to #17.
+-}
 adjustedTicksToDate : Int -> Date
 adjustedTicksToDate ticks =
-  Period.add
-    Period.Millisecond
-    (ticks - (epochTimezoneOffset * Core.ticksAMinute))
-    epochDate
+  let
+    date =
+      Period.add
+        Period.Millisecond
+        (ticks + (epochTimezoneOffset * Core.ticksAMinute))
+        epochDate
+    dateOffset = getTimezoneOffset date
+  in
+    if dateOffset == epochTimezoneOffset then
+      date
+    else
+      Period.add
+        Period.Minute
+        (dateOffset - epochTimezoneOffset)
+        date
 
 
 {-| Create a time in current time zone from given fields, for