diff --git a/date.h b/date.h
index f16886d..e5477ef 100644
--- a/date.h
+++ b/date.h
@@ -3633,7 +3633,7 @@ public:
 
     CONSTCD14 explicit operator precision() const NOEXCEPT
     {
-        return to24hr() + m_ + s_;
+        return to24hr() + s_ + m_;
     }
 
     CONSTCD14 precision to_duration() const NOEXCEPT
@@ -3714,7 +3714,7 @@ public:
 
     CONSTCD14 explicit operator precision() const NOEXCEPT
     {
-        return to24hr() + m_ + s_ + sub_s_;
+        return to24hr() + s_ + sub_s_ + m_;
     }
 
     CONSTCD14 precision to_duration() const NOEXCEPT
diff --git a/tz.cpp b/tz.cpp
index 3193469..592e1d7 100644
--- a/tz.cpp
+++ b/tz.cpp
@@ -708,7 +708,8 @@ MonthDayTime::to_sys_days(date::year y) const
 sys_seconds
 MonthDayTime::to_time_point(date::year y) const
 {
-    return to_sys_days(y) + h_ + m_ + s_;
+    // Add seconds first to promote to largest rep early to prevent overflow
+    return to_sys_days(y) + s_ + h_ + m_;
 }
 
 void
@@ -871,7 +872,7 @@ operator<<(std::ostream& os, const MonthDayTime& x)
         }
         break;
     }
-    os << date::make_time(x.h_ + x.m_ + x.s_);
+    os << date::make_time(x.s_ + x.h_ + x.m_);
     if (x.zone_ == tz::utc)
         os << "UTC   ";
     else if (x.zone_ == tz::standard)