--- a/gcc/ada/libgnat/a-calend.adb	Fri Oct 27 22:46:09 2017 +0900
+++ b/gcc/ada/libgnat/a-calend.adb	Thu Oct 25 07:37:49 2018 +0900
@@ -6,7 +6,7 @@
 --                                                                          --
 --                                 B o d y                                  --
 --                                                                          --
---          Copyright (C) 1992-2017, Free Software Foundation, Inc.         --
+--          Copyright (C) 1992-2018, Free Software Foundation, Inc.         --
 --                                                                          --
 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
 -- terms of the  GNU General Public License as published  by the Free Soft- --
@@ -203,10 +203,6 @@
      Ada_Low + Time_Rep (34 * 366 + 102 * 365) * Nanos_In_Day +
      Time_Rep (Leap_Seconds_Count) * Nano;
 
-   Epoch_Offset : constant Time_Rep := (136 * 365 + 44 * 366) * Nanos_In_Day;
-   --  The difference between 2150-1-1 UTC and 1970-1-1 UTC expressed in
-   --  nanoseconds. Note that year 2100 is non-leap.
-
    Cumulative_Days_Before_Month :
      constant array (Month_Number) of Natural :=
        (0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334);
@@ -504,6 +500,15 @@
       return D;
    end Day;
 
+   ------------------
+   -- Epoch_Offset --
+   ------------------
+
+   function Epoch_Offset return Time_Rep is
+   begin
+      return (136 * 365 + 44 * 366) * Nanos_In_Day;
+   end Epoch_Offset;
+
    -------------
    -- Is_Leap --
    -------------