--- old/src/java.base/share/classes/java/time/chrono/Chronology.java	2016-03-01 12:54:44.164575994 +0300
+++ new/src/java.base/share/classes/java/time/chrono/Chronology.java	2016-03-01 12:54:43.888575994 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -67,6 +67,7 @@
 import java.time.LocalDate;
 import java.time.LocalTime;
 import java.time.ZoneId;
+import java.time.ZoneOffset;
 import java.time.format.DateTimeFormatterBuilder;
 import java.time.format.ResolverStyle;
 import java.time.format.TextStyle;
@@ -712,6 +713,56 @@
         return new ChronoPeriodImpl(this, years, months, days);
     }
 
+    //---------------------------------------------------------------------
+
+    /**
+     * Gets the number of seconds from the Java epoch of 1970-01-01T00:00:00Z.
+     * <p>
+     * Returns the number of seconds from the epoch of 1970-01-01T00:00:00Z
+     * formed using given prolepticYear, month, dayOfMonth , hour, minute, second and zoneOffset.
+     * Subclass can override the default implementation for a more efficient implementation.
+     *
+     * @param prolepticYear the chronology proleptic-year
+     * @param month the chronology month-of-year
+     * @param dayOfMonth the chronology day-of-month
+     * @param hour the hour-of-day to represent, from 0 to 23
+     * @param minute the minute-of-hour to represent, from 0 to 59
+     * @param second the second-of-minute to represent, from 0 to 59
+     * @param zoneOffset the zone offset, not null
+     * @return the number of seconds relative to 1970-01-01T00:00:00Z, may be negative
+     */
+     public default long epochSecond(int prolepticYear, int month, int dayOfMonth,
+                                     int hour, int minute, int second, ZoneOffset zoneOffset) {
+        Objects.requireNonNull(zoneOffset, "zoneOffset");
+        long daysInSec = Math.multiplyExact(date(prolepticYear, month, dayOfMonth).toEpochDay(), 86400);
+        long timeinSec = (hour * 60 + minute) * 60 + second;
+        return Math.addExact(daysInSec, timeinSec - zoneOffset.getTotalSeconds());
+    }
+
+    /**
+     * Gets the number of seconds from the epoch of 1970-01-01T00:00:00Z.
+     * <p>
+     * The number of seconds is caluculated using given era, prolepticYear,
+     * month, dayOfMonth , hour, minute, second and zoneOffset.
+     *
+     * @param era  the era of the correct type for the chronology, not null
+     * @param yearofEra the chronology year-of-era
+     * @param month the chronology month-of-year
+     * @param dayOfMonth the chronology day-of-month
+     * @param hour the hour-of-day to represent, from 0 to 23
+     * @param minute the minute-of-hour to represent, from 0 to 59
+     * @param second the second-of-minute to represent, from 0 to 59
+     * @param zoneOffset the zone offset, not null
+     * @return the number of seconds relative to 1970-01-01T00:00:00Z, may be negative
+     */
+     public default long epochSecond(Era era, int yearofEra, int month, int dayOfMonth,
+                                     int hour, int minute, int second, ZoneOffset zoneOffset) {
+        Objects.requireNonNull(era, "era");
+        Objects.requireNonNull(zoneOffset, "zoneOffset");
+        long daysInSec = Math.multiplyExact(date(era, yearofEra, month, dayOfMonth).toEpochDay(), 86400);
+        long timeinSec = (hour * 60 + minute) * 60 + second;
+        return Math.addExact(daysInSec, timeinSec - zoneOffset.getTotalSeconds());
+    }
     //-----------------------------------------------------------------------
     /**
      * Compares this chronology to another chronology.