diff --git a/src/libqof/qof/gnc-date.cpp b/src/libqof/qof/gnc-date.cpp
index 4f357a1937..847e255f7f 100644
--- a/src/libqof/qof/gnc-date.cpp
+++ b/src/libqof/qof/gnc-date.cpp
@@ -155,20 +155,34 @@ gnc_tm_free (struct tm* time)
 struct tm*
 gnc_localtime (const time64 *secs)
 {
-    auto time = static_cast<struct tm*>(calloc(1, sizeof(struct tm)));
-    if (gnc_localtime_r (secs, time) == NULL)
+    try
+    {
+	auto time = static_cast<struct tm*>(calloc(1, sizeof(struct tm)));
+	if (gnc_localtime_r (secs, time) == NULL)
+	{
+	    gnc_tm_free (time);
+	    return NULL;
+	}
+	return time;
+    }
+    catch(std::invalid_argument)
     {
-	gnc_tm_free (time);
 	return NULL;
     }
-    return time;
 }
 
 struct tm*
 gnc_localtime_r (const time64 *secs, struct tm* time)
 {
-    *time = static_cast<struct tm>(GncDateTime(*secs));
-    return time;
+    try
+    {
+	*time = static_cast<struct tm>(GncDateTime(*secs));
+	return time;
+    }
+    catch(std::invalid_argument)
+    {
+	return NULL;
+    }
 }
 
 static void
@@ -232,34 +246,48 @@ normalize_struct_tm (struct tm* time)
 struct tm*
 gnc_gmtime (const time64 *secs)
 {
-    auto time = static_cast<struct tm*>(calloc(1, sizeof(struct tm)));
-    GncDateTime gncdt(*secs);
-    *time = static_cast<struct tm>(gncdt);
-    auto gmtoff = gncdt.offset();
-    time->tm_hour -= gmtoff / 3600;
-    time->tm_min -= (gmtoff % 3600 / 60);
-    time->tm_sec -= gmtoff % 60;
-    normalize_struct_tm(time);
-    return time;
+    try
+    {
+	auto time = static_cast<struct tm*>(calloc(1, sizeof(struct tm)));
+	GncDateTime gncdt(*secs);
+	*time = gncdt.utc_tm();
+	return time;
+    }
+    catch(std::invalid_argument)
+    {
+	return NULL;
+    }
+
 }
 
 time64
 gnc_mktime (struct tm* time)
 {
-    normalize_struct_tm (time);
-    auto ldt = gnc_get_LDT (time->tm_year + 1900, time->tm_mon + 1,
-			    time->tm_mday, time->tm_hour, time->tm_min,
-			    time->tm_sec);
-    return time64_from_date_time(ldt);
+    try
+    {
+	normalize_struct_tm (time);
+	GncDateTime gncdt(*time);
+	return static_cast<time64>(gncdt) - gncdt.offset();
+    }
+    catch(std::invalid_argument)
+    {
+	return 0;
+    }
 }
 
 time64
 gnc_timegm (struct tm* time)
 {
-    auto newtime = *time;
-    normalize_struct_tm(time);
-    auto pdt = boost::posix_time::ptime_from_tm(*time);
-    return time64_from_date_time(pdt);
+    try
+    {
+	normalize_struct_tm(time);
+	return static_cast<time64>(GncDateTime(*time));
+    }
+    catch(std::invalid_argument)
+    {
+	return 0;
+    }
+
 }
 
 char*
diff --git a/src/libqof/qof/gnc-datetime.cpp b/src/libqof/qof/gnc-datetime.cpp
index 8d2f097049..40ac1a689b 100644
--- a/src/libqof/qof/gnc-datetime.cpp
+++ b/src/libqof/qof/gnc-datetime.cpp
@@ -81,21 +81,35 @@ GncDateImpl::ymd() const
 static LDT
 LDT_from_unix_local(const time64 time)
 {
-    PTime temp(unix_epoch.date(),
-	       boost::posix_time::hours(time / 3600) +
-	       boost::posix_time::seconds(time % 3600));
-    auto tz = tzp.get(temp.date().year());
-    return LDT(temp, tz);
+    try
+    {
+	PTime temp(unix_epoch.date(),
+		   boost::posix_time::hours(time / 3600) +
+		   boost::posix_time::seconds(time % 3600));
+	auto tz = tzp.get(temp.date().year());
+	return LDT(temp, tz);
+    }
+    catch(boost::gregorian::bad_year)
+    {
+	throw(std::invalid_argument("Time value is outside the supported year range."));
+    }
 }
 
 static LDT
 LDT_from_struct_tm(const struct tm tm)
 {
-    auto tdate = boost::gregorian::date_from_tm(tm);
-    auto tdur = boost::posix_time::time_duration(tm.tm_hour, tm.tm_min,
-						 tm.tm_sec, 0);
-    auto tz = tzp.get(tdate.year());
-    return LDT(PTime(tdate, tdur), tz);
+    try
+    {
+	auto tdate = boost::gregorian::date_from_tm(tm);
+	auto tdur = boost::posix_time::time_duration(tm.tm_hour, tm.tm_min,
+						     tm.tm_sec, 0);
+	auto tz = tzp.get(tdate.year());
+	return LDT(PTime(tdate, tdur), tz);
+    }
+    catch(boost::gregorian::bad_year)
+    {
+	throw(std::invalid_argument("Time value is outside the supported year range."));
+    }
 }
 
 class GncDateTimeImpl
@@ -113,6 +127,7 @@ public:
     void now() { m_time = boost::local_time::local_sec_clock::local_time(tzp.get(boost::gregorian::day_clock::local_day().year())); }
     long offset() const;
     long nsecs() const;
+    struct tm utc_tm() const { return to_tm(m_time.utc_time()); }
     std::unique_ptr<GncDateImpl> date() const;
     std::string format(const char* format) const;
 private:
@@ -157,7 +172,11 @@ GncDateTimeImpl::operator time64() const
 
 GncDateTimeImpl::operator struct tm() const
 {
-    return to_tm(m_time);
+    struct tm time = to_tm(m_time);
+#if HAVE_STRUCT_TM_GMTOFF
+    time.tm_gmtoff = offset();
+#endif
+    return time;
 }
 
 long
@@ -252,6 +271,12 @@ GncDateTime::nsecs() const
     return m_impl->nsecs();
 }
 
+struct tm
+GncDateTime::utc_tm() const
+{
+    return m_impl->utc_tm();
+}
+
 GncDate
 GncDateTime::date() const
 {
diff --git a/src/libqof/qof/gnc-datetime.hpp b/src/libqof/qof/gnc-datetime.hpp
index e2fe6a704b..46dd83d896 100644
--- a/src/libqof/qof/gnc-datetime.hpp
+++ b/src/libqof/qof/gnc-datetime.hpp
@@ -123,8 +123,7 @@ public:
     void now();
 /** Cast the GncDateTime to a time64, seconds from the POSIX epoch. */
     explicit operator time64() const;
-/** Cast the GncDateTime to a struct tm. Timezone and offset fields
- * are not filled.
+/** Cast the GncDateTime to a struct tm. Timezone field isn't filled.
  */
     explicit operator struct tm() const;
 /** Obtain the UTC offset in seconds
@@ -137,6 +136,10 @@ public:
  *  with the time.
  */
     long nsecs() const;
+/** Obtain a struct tm representing the time in UTC.
+ * @return struct tm
+ */
+    struct tm utc_tm() const;
 /** Obtain the date from the time, as a GncDate, in the current timezone.
  *  @return GncDate represented by the GncDateTime.
  */