From bb893dcdfd9d6a991aef11895ec64f3e89438af0 Mon Sep 17 00:00:00 2001
From: Hans Bolinder <hasse@erlang.org>
Date: Wed, 30 May 2018 08:57:32 +0200
Subject: stdlib: Add links to RFC 3339 in calendar(3)

---
 lib/stdlib/doc/src/calendar.xml | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/stdlib/doc/src/calendar.xml b/lib/stdlib/doc/src/calendar.xml
index 8f2b6b747a..6b4fa7f98a 100644
--- a/lib/stdlib/doc/src/calendar.xml
+++ b/lib/stdlib/doc/src/calendar.xml
@@ -323,7 +323,9 @@
       <type name="rfc3339_string"/>
       <type name="rfc3339_time_unit"/>
       <desc>
-	<p>Converts an RFC 3339 timestamp into system time.</p>
+        <p>Converts an RFC 3339 timestamp into system time. The data format
+          of RFC 3339 timestamps is described by
+          <url href="https://www.ietf.org/rfc/rfc3339.txt">RFC 3339</url>.</p>
 	<p>Valid option:</p>
 	<taglist>
 	  <tag><c>{unit, Unit}</c></tag>
@@ -378,7 +380,10 @@
       <type name="rfc3339_string"/>
       <type name="rfc3339_time_unit"/>
       <desc>
-	<p>Converts a system time into RFC 3339 timestamp.</p>
+        <p>Converts a system time into an RFC 3339 timestamp. The data format
+          of RFC 3339 timestamps is described by
+          <url href="https://www.ietf.org/rfc/rfc3339.txt">RFC 3339</url>.
+	  The data format of offsets is also described by RFC 3339.</p>
 	<p>Valid options:</p>
 	<taglist>
 	  <tag><c>{offset, Offset}</c></tag>
-- 
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