Fix incorrect handling of 24h overflows with an offset on RDF.XSD.Time

CHANGELOG.md

@@ -5,6 +5,17 @@ This project adheres to [Semantic Versioning](http://semver.org/) and
 [Keep a CHANGELOG](http://keepachangelog.com).
 
 
+## Unreleased
+
+### Fixed
+
+- `RDF.XSD.Time` didn't handle 24h overflows with an offset correctly
+
+
+[Compare v0.7.0...HEAD](https://github.com/marcelotto/rdf-ex/compare/v0.7.0...HEAD)
+
+
+
 ## 0.7.0 - 2019-11-22
 
 ### Added

lib/rdf/datatypes/time.ex

@@ -58,7 +58,7 @@ defmodule RDF.Time do
           if (minute = time.minute - minute) < 0 do
             {rem(24 + time.hour - hour - 1, 24), minute + 60}
           else
-            {time.hour - hour - div(minute, 60), rem(minute, 60)}
+            {rem(24 + time.hour - hour - div(minute, 60), 24), rem(minute, 60)}
           end
       end
     %Time{time | hour: hour, minute: minute}