diff --git a/date.html b/date.html
index 01e1517..92d7408 100644
--- a/date.html
+++ b/date.html
@@ -2492,6 +2492,9 @@ public:
     year& operator+=(const years& y) noexcept;
     year& operator-=(const years& y) noexcept;
 
+    constexpr year operator-() const noexcept;
+    constexpr year operator+() const noexcept;
+
     constexpr bool is_leap() const noexcept;
 
     constexpr explicit operator int() const noexcept;
@@ -2634,6 +2637,26 @@ year& year::operator-=(const years& y) noexcept;
 </p>
 </blockquote>
 
+<pre>
+constepxr year year::operator-() const noexcept;
+</pre>
+
+<blockquote>
+<p>
+<i>Returns:</i> <code>year{-y_}</code>.
+</p>
+</blockquote>
+
+<pre>
+constepxr year year::operator+() const noexcept;
+</pre>
+
+<blockquote>
+<p>
+<i>Returns:</i> <code>*this</code>.
+</p>
+</blockquote>
+
 <pre>
 constexpr bool year::is_leap() const noexcept;
 </pre>