diff --git a/d0355r1.html b/d0355r1.html
index a7ee2cb..b1b911f 100644
--- a/d0355r1.html
+++ b/d0355r1.html
@@ -637,30 +637,30 @@ template <class Duration>
     to_utc_time(sys_time<Duration> t);
 template <class Duration>
     utc_time<common_type_t<Duration, seconds>>
-    to_utc_time(tai_time<Duration> t);
+    to_utc_time(tai_time<Duration> t) noexcept;
 template <class Duration>
     utc_time<common_type_t<Duration, seconds>>
-    to_utc_time(gps_time<Duration> t);
+    to_utc_time(gps_time<Duration> t) noexcept;
 
 template <class Duration>
     tai_time<common_type_t<Duration, seconds>>
     to_tai_time(sys_time<Duration> t);
 template <class Duration>
     tai_time<common_type_t<Duration, seconds>>
-    to_tai_time(utc_time<Duration> t);
+    to_tai_time(utc_time<Duration> t) noexcept;
 template <class Duration>
     tai_time<common_type_t<Duration, seconds>>
-    to_tai_time(gps_time<Duration> t);
+    to_tai_time(gps_time<Duration> t) noexcept;
 
 template <class Duration>
     gps_time<common_type_t<Duration, seconds>>
     to_gps_time(sys_time<Duration> t);
 template <class Duration>
     gps_time<common_type_t<Duration, seconds>>
-    to_gps_time(utc_time<Duration> t);
+    to_gps_time(utc_time<Duration> t) noexcept;
 template <class Duration>
     gps_time<common_type_t<Duration, seconds>>
-    to_gps_time(tai_time<Duration> t);
+    to_gps_time(tai_time<Duration> t) noexcept;
 
 template <class charT, class traits, class Duration>
     basic_ostream<charT, traits>&
@@ -1639,7 +1639,7 @@ assert(u.time_since_epoch() - t.time_since_epoch() == 26s);
 <pre>
 template &lt;class Duration&gt;
 utc_time&lt;common_type_t&lt;Duration, seconds&gt;&gt;
-to_utc_time(tai_time&lt;Duration&gt; t);
+to_utc_time(tai_time&lt;Duration&gt; t) noexcept;
 </pre>
 <blockquote>
 <p>
@@ -1653,7 +1653,7 @@ to_utc_time(tai_time&lt;Duration&gt; t);
 <pre>
 template &lt;class Duration&gt;
 utc_time&lt;common_type_t&lt;Duration, seconds&gt;&gt;
-to_utc_time(gps_time&lt;Duration&gt; t);
+to_utc_time(gps_time&lt;Duration&gt; t) noexcept;
 </pre>
 <blockquote>
 <p>
@@ -1759,7 +1759,7 @@ to_tai_time(sys_time&lt;Duration&gt; t);
 <pre>
 template &lt;class Duration&gt;
 tai_time&lt;common_type_t&lt;Duration, seconds&gt;&gt;
-to_tai_time(utc_time&lt;Duration&gt; t);
+to_tai_time(utc_time&lt;Duration&gt; t) noexcept;
 </pre>
 <blockquote>
 <p>
@@ -1773,7 +1773,7 @@ to_tai_time(utc_time&lt;Duration&gt; t);
 <pre>
 template &lt;class Duration&gt;
 tai_time&lt;common_type_t&lt;Duration, seconds&gt;&gt;
-to_tai_time(gps_time&lt;Duration&gt; t);
+to_tai_time(gps_time&lt;Duration&gt; t) noexcept;
 </pre>
 <blockquote>
 <p>
@@ -1858,7 +1858,7 @@ to_gps_time(sys_time&lt;Duration&gt; t);
 <pre>
 template &lt;class Duration&gt;
 gps_time&lt;common_type_t&lt;Duration, seconds&gt;&gt;
-to_gps_time(utc_time&lt;Duration&gt; t);
+to_gps_time(utc_time&lt;Duration&gt; t) noexcept;
 </pre>
 <blockquote>
 <p>
@@ -1872,7 +1872,7 @@ to_gps_time(utc_time&lt;Duration&gt; t);
 <pre>
 template &lt;class Duration&gt;
 gps_time&lt;common_type_t&lt;Duration, seconds&gt;&gt;
-to_gps_time(tai_time&lt;Duration&gt; t);
+to_gps_time(tai_time&lt;Duration&gt; t) noexcept;
 </pre>
 <blockquote>
 <p>
diff --git a/tz.html b/tz.html
index e99a4a4..fdadb79 100644
--- a/tz.html
+++ b/tz.html
@@ -2402,7 +2402,7 @@ second insertion), then the conversion counts that leap second as inserted.
 <pre>
 template &lt;class Duration&gt;
 utc_time&lt;std::common_type_t&lt;Duration, std::chrono::seconds&gt;&gt;
-to_utc_time(tai_time&lt;Duration&gt; t)
+to_utc_time(tai_time&lt;Duration&gt; t) noexcept
 </pre>
 <blockquote>
 <p>
@@ -2416,7 +2416,7 @@ to_utc_time(tai_time&lt;Duration&gt; t)
 <pre>
 template &lt;class Duration&gt;
 utc_time&lt;std::common_type_t&lt;Duration, std::chrono::seconds&gt;&gt;
-to_utc_time(gps_time&lt;Duration&gt; t)
+to_utc_time(gps_time&lt;Duration&gt; t) noexcept
 </pre>
 <blockquote>
 <p>
@@ -2508,7 +2508,7 @@ to_tai_time(sys_time&lt;Duration&gt; t)
 <pre>
 template &lt;class Duration&gt;
 tai_time&lt;std::common_type_t&lt;Duration, std::chrono::seconds&gt;&gt;
-to_tai_time(utc_time&lt;Duration&gt; u)
+to_tai_time(utc_time&lt;Duration&gt; u) noexcept
 </pre>
 <blockquote>
 <p>
@@ -2522,7 +2522,7 @@ to_tai_time(utc_time&lt;Duration&gt; u)
 <pre>
 template &lt;class Duration&gt;
 tai_time&lt;typename std::common_type&lt;Duration, std::chrono::seconds&gt;::type&gt;
-to_tai_time(gps_time&lt;Duration&gt; t)
+to_tai_time(gps_time&lt;Duration&gt; t) noexcept
 </pre>
 <blockquote>
 <p>
@@ -2618,7 +2618,7 @@ to_gps_time(sys_time&lt;Duration&gt; t)
 <pre>
 template &lt;class Duration&gt;
 gps_time&lt;std::common_type_t&lt;Duration, std::chrono::seconds&gt;&gt;
-to_gps_time(utc_time&lt;Duration&gt; u)
+to_gps_time(utc_time&lt;Duration&gt; u) noexcept
 </pre>
 <blockquote>
 <p>
@@ -2632,7 +2632,7 @@ to_gps_time(utc_time&lt;Duration&gt; u)
 <pre>
 template &lt;class Duration&gt;
 gps_time&lt;typename std::common_type&lt;Duration, std::chrono::seconds&gt;::type&gt;
-to_gps_time(tai_time&lt;Duration&gt; t)
+to_gps_time(tai_time&lt;Duration&gt; t) noexcept
 </pre>
 <blockquote>
 <p>