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diff --git a/intl/icu/source/i18n/dayperiodrules.h b/intl/icu/source/i18n/dayperiodrules.h
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+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+* Copyright (C) 2016, International Business Machines
+* Corporation and others.  All Rights Reserved.
+*******************************************************************************
+* dayperiodrules.h
+*
+* created on: 2016-01-20
+* created by: kazede
+*/
+
+#ifndef DAYPERIODRULES_H
+#define DAYPERIODRULES_H
+
+#include "unicode/locid.h"
+#include "unicode/unistr.h"
+#include "unicode/uobject.h"
+#include "unicode/utypes.h"
+#include "resource.h"
+#include "uhash.h"
+
+
+
+U_NAMESPACE_BEGIN
+
+struct DayPeriodRulesDataSink;
+
+class DayPeriodRules : public UMemory {
+    friend struct DayPeriodRulesDataSink;
+public:
+    enum DayPeriod {
+        DAYPERIOD_UNKNOWN = -1,
+        DAYPERIOD_MIDNIGHT,
+        DAYPERIOD_NOON,
+        DAYPERIOD_MORNING1,
+        DAYPERIOD_AFTERNOON1,
+        DAYPERIOD_EVENING1,
+        DAYPERIOD_NIGHT1,
+        DAYPERIOD_MORNING2,
+        DAYPERIOD_AFTERNOON2,
+        DAYPERIOD_EVENING2,
+        DAYPERIOD_NIGHT2,
+        DAYPERIOD_AM,
+        DAYPERIOD_PM
+    };
+
+    static const DayPeriodRules *getInstance(const Locale &locale, UErrorCode &errorCode);
+
+    UBool hasMidnight() const { return fHasMidnight; }
+    UBool hasNoon() const { return fHasNoon; }
+    DayPeriod getDayPeriodForHour(int32_t hour) const { return fDayPeriodForHour[hour]; }
+
+    // Returns the center of dayPeriod. Half hours are indicated with a .5 .
+    double getMidPointForDayPeriod(DayPeriod dayPeriod, UErrorCode &errorCode) const;
+
+private:
+    DayPeriodRules();
+
+    // Translates "morning1" to DAYPERIOD_MORNING1, for example.
+    static DayPeriod getDayPeriodFromString(const char *type_str);
+
+    static void U_CALLCONV load(UErrorCode &errorCode);
+
+    // Sets period type for all hours in [startHour, limitHour).
+    void add(int32_t startHour, int32_t limitHour, DayPeriod period);
+
+    // Returns true if for all i, DayPeriodForHour[i] has a type other than UNKNOWN.
+    // Values of HasNoon and HasMidnight do not affect the return value.
+    UBool allHoursAreSet();
+
+    // Returns the hour that starts dayPeriod. Returns 0 for MIDNIGHT and 12 for NOON.
+    int32_t getStartHourForDayPeriod(DayPeriod dayPeriod, UErrorCode &errorCode) const;
+
+    // Returns the hour that ends dayPeriod, i.e. that starts the next period.
+    // E.g. if fDayPeriodForHour[13] thru [16] are AFTERNOON1, then this function returns 17 if
+    // queried with AFTERNOON1.
+    // Returns 0 for MIDNIGHT and 12 for NOON.
+    int32_t getEndHourForDayPeriod(DayPeriod dayPeriod, UErrorCode &errorCode) const;
+
+    UBool fHasMidnight;
+    UBool fHasNoon;
+    DayPeriod fDayPeriodForHour[24];
+};
+
+U_NAMESPACE_END
+
+#endif /* DAYPERIODRULES_H */