From be2b4424a1a167159bd405e3f1d7a44f18579e15 Mon Sep 17 00:00:00 2001
From: Per Malmberg <per.malmberg@gmail.com>
Date: Sun, 11 Mar 2018 19:07:35 +0100
Subject: [PATCH] Added note about UTC.

---
 README.md                 | 11 ++++++++++-
 test/CronScheduleTest.cpp | 17 ++++++++++++++++-
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 4ee1c7a..8fc295a 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,10 @@
 # libcron
 A C++ scheduling library using cron formatting.
 
+# Time zones
+
+This library uses `std::chrono::system_clock::timepoint` as its time unit, thus all calculations are in UTC. 
+
 # Supported formatting
 
 This implementation supports cron format, as specified below.  
@@ -59,4 +63,9 @@ the '?'-character unless one field already is something other than '*'.
 | * * * * * ? | Every second
 |0 0 12 * * MON-FRI | Every Weekday at noon
 |0 0 12 1/2 * ?	| Every 2 days, starting on the 1st at noon
-| 0 0 */12 ? * * | Every twelve hours
\ No newline at end of file
+| 0 0 */12 ? * * | Every twelve hours
+
+# Third party libraries
+
+Howard Hinnant's [date.h](https://github.com/HowardHinnant/date/)
+
diff --git a/test/CronScheduleTest.cpp b/test/CronScheduleTest.cpp
index f76f866..8115cf6 100644
--- a/test/CronScheduleTest.cpp
+++ b/test/CronScheduleTest.cpp
@@ -207,9 +207,24 @@ SCENARIO("Examples from README.md")
                          DT(2018_y / 8 / 16, hours{12}),
                          DT(2018_y / 8 / 17, hours{0})
                  }));
-
 }
 
+//SCENARIO("Daylight Savings Time")
+//{
+//    // In sweden when local standard time is about to reach
+//    //Sunday, 25 March 2018, 02:00:00 clocks are turned forward 1 hour to
+//    //Sunday, 25 March 2018, 03:00:00 local daylight time instead.
+//
+//    REQUIRE(test("0 0 * * * ?", DT(2018_y / 3 / 25, hours{0}),
+//                 {
+//                         DT(2018_y / 3 / 25, hours{0}),
+//                         DT(2018_y / 3 / 25, hours{1}),
+//                         // This hour disappear! DT(2018_y / 3 / 25, hours{2}),
+//                         DT(2018_y / 3 / 25, hours{3}),
+//                         DT(2018_y / 3 / 25, hours{4})
+//                 }));
+//}
+
 SCENARIO("Unable to calculate time point")
 {
     // TODO: Find a schedule that is unsolvable.