diff --git a/icu4c/source/i18n/buddhcal.cpp b/icu4c/source/i18n/buddhcal.cpp
index 7723ade105d2..c99b97e26713 100644
--- a/icu4c/source/i18n/buddhcal.cpp
+++ b/icu4c/source/i18n/buddhcal.cpp
@@ -36,7 +36,6 @@ static const int32_t kGregorianEpoch = 1970;    // used as the default value of
 BuddhistCalendar::BuddhistCalendar(const Locale& aLocale, UErrorCode& success)
 :   GregorianCalendar(aLocale, success)
 {
-    setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
 }
 
 BuddhistCalendar::~BuddhistCalendar()
@@ -48,12 +47,6 @@ BuddhistCalendar::BuddhistCalendar(const BuddhistCalendar& source)
 {
 }
 
-BuddhistCalendar& BuddhistCalendar::operator= ( const BuddhistCalendar& right)
-{
-    GregorianCalendar::operator=(right);
-    return *this;
-}
-
 BuddhistCalendar* BuddhistCalendar::clone() const
 {
     return new BuddhistCalendar(*this);
diff --git a/icu4c/source/i18n/buddhcal.h b/icu4c/source/i18n/buddhcal.h
index 1fa8395b35b2..196b21311fda 100644
--- a/icu4c/source/i18n/buddhcal.h
+++ b/icu4c/source/i18n/buddhcal.h
@@ -82,13 +82,6 @@ class BuddhistCalendar : public GregorianCalendar {
      */
     BuddhistCalendar(const BuddhistCalendar& source);
 
-    /**
-     * Default assignment operator
-     * @param right    the object to be copied.
-     * @internal
-     */
-    BuddhistCalendar& operator=(const BuddhistCalendar& right);
-
     /**
      * Create and return a polymorphic copy of this calendar.
      * @return    return a polymorphic copy of this calendar.
diff --git a/icu4c/source/i18n/cecal.cpp b/icu4c/source/i18n/cecal.cpp
index 7771c32efb30..33d32adab731 100644
--- a/icu4c/source/i18n/cecal.cpp
+++ b/icu4c/source/i18n/cecal.cpp
@@ -53,7 +53,6 @@ static const int32_t LIMITS[UCAL_FIELD_COUNT][4] = {
 CECalendar::CECalendar(const Locale& aLocale, UErrorCode& success)
 :   Calendar(TimeZone::forLocaleOrDefault(aLocale), aLocale, success)
 {
-    setTimeInMillis(getNow(), success);
 }
 
 CECalendar::CECalendar (const CECalendar& other) 
@@ -65,13 +64,6 @@ CECalendar::~CECalendar()
 {
 }
 
-CECalendar&
-CECalendar::operator=(const CECalendar& right)
-{
-    Calendar::operator=(right);
-    return *this;
-}
-
 //-------------------------------------------------------------------------
 // Calendar framework
 //-------------------------------------------------------------------------
diff --git a/icu4c/source/i18n/cecal.h b/icu4c/source/i18n/cecal.h
index 9c3332f3b84a..e6514e18f857 100644
--- a/icu4c/source/i18n/cecal.h
+++ b/icu4c/source/i18n/cecal.h
@@ -82,13 +82,6 @@ class U_I18N_API CECalendar : public Calendar {
      */
     virtual ~CECalendar();
 
-    /**
-     * Default assignment operator
-     * @param right    Calendar object to be copied
-     * @internal
-     */
-    CECalendar& operator=(const CECalendar& right);
-
 protected:
     //-------------------------------------------------------------------------
     // Calendar framework
diff --git a/icu4c/source/i18n/chnsecal.cpp b/icu4c/source/i18n/chnsecal.cpp
index 63dcba994025..70b37f19073c 100644
--- a/icu4c/source/i18n/chnsecal.cpp
+++ b/icu4c/source/i18n/chnsecal.cpp
@@ -130,7 +130,6 @@ ChineseCalendar::ChineseCalendar(const Locale& aLocale, UErrorCode& success)
 :   Calendar(TimeZone::forLocaleOrDefault(aLocale), aLocale, success),
     hasLeapMonthBetweenWinterSolstices(false)
 {
-    setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
 }
 
 ChineseCalendar::ChineseCalendar(const ChineseCalendar& other) : Calendar(other) {
diff --git a/icu4c/source/i18n/gregocal.cpp b/icu4c/source/i18n/gregocal.cpp
index 0c09faf3f2ff..e012317c3746 100644
--- a/icu4c/source/i18n/gregocal.cpp
+++ b/icu4c/source/i18n/gregocal.cpp
@@ -147,6 +147,7 @@ UOBJECT_DEFINE_RTTI_IMPLEMENTATION(GregorianCalendar)
 // in Java, -12219292800000L
 //const UDate GregorianCalendar::kPapalCutover = -12219292800000L;
 static const uint32_t kCutoverJulianDay = 2299161;
+static const int32_t kDefaultCutoverYear = 1582;
 static const UDate kPapalCutover = (2299161.0 - kEpochStartAsJulianDay) * U_MILLIS_PER_DAY;
 //static const UDate kPapalCutoverJulian = (2299161.0 - kEpochStartAsJulianDay);
 
@@ -155,7 +156,7 @@ static const UDate kPapalCutover = (2299161.0 - kEpochStartAsJulianDay) * U_MILL
 GregorianCalendar::GregorianCalendar(UErrorCode& status)
 :   Calendar(status),
 fGregorianCutover(kPapalCutover),
-fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
+fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(kDefaultCutoverYear),
 fIsGregorian(true), fInvertGregorian(false)
 {
     setTimeInMillis(getNow(), status);
@@ -164,34 +165,22 @@ fIsGregorian(true), fInvertGregorian(false)
 // -------------------------------------
 
 GregorianCalendar::GregorianCalendar(TimeZone* zone, UErrorCode& status)
-:   Calendar(zone, Locale::getDefault(), status),
-fGregorianCutover(kPapalCutover),
-fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
-fIsGregorian(true), fInvertGregorian(false)
+:   GregorianCalendar(zone, Locale::getDefault(), status)
 {
-    setTimeInMillis(getNow(), status);
 }
 
 // -------------------------------------
 
 GregorianCalendar::GregorianCalendar(const TimeZone& zone, UErrorCode& status)
-:   Calendar(zone, Locale::getDefault(), status),
-fGregorianCutover(kPapalCutover),
-fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
-fIsGregorian(true), fInvertGregorian(false)
+:   GregorianCalendar(zone, Locale::getDefault(), status)
 {
-    setTimeInMillis(getNow(), status);
 }
 
 // -------------------------------------
 
 GregorianCalendar::GregorianCalendar(const Locale& aLocale, UErrorCode& status)
-:   Calendar(TimeZone::forLocaleOrDefault(aLocale), aLocale, status),
-fGregorianCutover(kPapalCutover),
-fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
-fIsGregorian(true), fInvertGregorian(false)
+:   GregorianCalendar(TimeZone::forLocaleOrDefault(aLocale), aLocale, status)
 {
-    setTimeInMillis(getNow(), status);
 }
 
 // -------------------------------------
@@ -200,7 +189,7 @@ GregorianCalendar::GregorianCalendar(TimeZone* zone, const Locale& aLocale,
                                      UErrorCode& status)
                                      :   Calendar(zone, aLocale, status),
                                      fGregorianCutover(kPapalCutover),
-                                     fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
+                                     fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(kDefaultCutoverYear),
                                      fIsGregorian(true), fInvertGregorian(false)
 {
     setTimeInMillis(getNow(), status);
@@ -212,7 +201,7 @@ GregorianCalendar::GregorianCalendar(const TimeZone& zone, const Locale& aLocale
                                      UErrorCode& status)
                                      :   Calendar(zone, aLocale, status),
                                      fGregorianCutover(kPapalCutover),
-                                     fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
+                                     fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(kDefaultCutoverYear),
                                      fIsGregorian(true), fInvertGregorian(false)
 {
     setTimeInMillis(getNow(), status);
@@ -224,7 +213,7 @@ GregorianCalendar::GregorianCalendar(int32_t year, int32_t month, int32_t date,
                                      UErrorCode& status)
                                      :   Calendar(TimeZone::createDefault(), Locale::getDefault(), status),
                                      fGregorianCutover(kPapalCutover),
-                                     fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
+                                     fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(kDefaultCutoverYear),
                                      fIsGregorian(true), fInvertGregorian(false)
 {
     set(UCAL_ERA, AD);
@@ -237,15 +226,8 @@ GregorianCalendar::GregorianCalendar(int32_t year, int32_t month, int32_t date,
 
 GregorianCalendar::GregorianCalendar(int32_t year, int32_t month, int32_t date,
                                      int32_t hour, int32_t minute, UErrorCode& status)
-                                     :   Calendar(TimeZone::createDefault(), Locale::getDefault(), status),
-                                     fGregorianCutover(kPapalCutover),
-                                     fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
-                                     fIsGregorian(true), fInvertGregorian(false)
+                                     :   GregorianCalendar(year, month, date, status)
 {
-    set(UCAL_ERA, AD);
-    set(UCAL_YEAR, year);
-    set(UCAL_MONTH, month);
-    set(UCAL_DATE, date);
     set(UCAL_HOUR_OF_DAY, hour);
     set(UCAL_MINUTE, minute);
 }
@@ -255,17 +237,8 @@ GregorianCalendar::GregorianCalendar(int32_t year, int32_t month, int32_t date,
 GregorianCalendar::GregorianCalendar(int32_t year, int32_t month, int32_t date,
                                      int32_t hour, int32_t minute, int32_t second,
                                      UErrorCode& status)
-                                     :   Calendar(TimeZone::createDefault(), Locale::getDefault(), status),
-                                     fGregorianCutover(kPapalCutover),
-                                     fCutoverJulianDay(kCutoverJulianDay), fNormalizedGregorianCutover(fGregorianCutover), fGregorianCutoverYear(1582),
-                                     fIsGregorian(true), fInvertGregorian(false)
+                                     :   GregorianCalendar(year, month, date, hour, minute, status)
 {
-    set(UCAL_ERA, AD);
-    set(UCAL_YEAR, year);
-    set(UCAL_MONTH, month);
-    set(UCAL_DATE, date);
-    set(UCAL_HOUR_OF_DAY, hour);
-    set(UCAL_MINUTE, minute);
     set(UCAL_SECOND, second);
 }
 
diff --git a/icu4c/source/i18n/hebrwcal.cpp b/icu4c/source/i18n/hebrwcal.cpp
index ef70a48f2353..1f8a4bc341c0 100644
--- a/icu4c/source/i18n/hebrwcal.cpp
+++ b/icu4c/source/i18n/hebrwcal.cpp
@@ -164,7 +164,6 @@ HebrewCalendar::HebrewCalendar(const Locale& aLocale, UErrorCode& success)
 :   Calendar(TimeZone::forLocaleOrDefault(aLocale), aLocale, success)
 
 {
-    setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
 }
 
 
diff --git a/icu4c/source/i18n/indiancal.cpp b/icu4c/source/i18n/indiancal.cpp
index b1fd39b9927e..ca839da4d553 100644
--- a/icu4c/source/i18n/indiancal.cpp
+++ b/icu4c/source/i18n/indiancal.cpp
@@ -41,7 +41,6 @@ IndianCalendar* IndianCalendar::clone() const {
 IndianCalendar::IndianCalendar(const Locale& aLocale, UErrorCode& success)
   :   Calendar(TimeZone::forLocaleOrDefault(aLocale), aLocale, success)
 {
-  setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
 }
 
 IndianCalendar::IndianCalendar(const IndianCalendar& other) : Calendar(other) {
diff --git a/icu4c/source/i18n/islamcal.cpp b/icu4c/source/i18n/islamcal.cpp
index dfeac36a6651..727141fa2912 100644
--- a/icu4c/source/i18n/islamcal.cpp
+++ b/icu4c/source/i18n/islamcal.cpp
@@ -202,7 +202,6 @@ IslamicCalendar* IslamicCalendar::clone() const {
 IslamicCalendar::IslamicCalendar(const Locale& aLocale, UErrorCode& success)
 :   Calendar(TimeZone::forLocaleOrDefault(aLocale), aLocale, success)
 {
-    setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
 }
 
 IslamicCalendar::~IslamicCalendar()
diff --git a/icu4c/source/i18n/japancal.cpp b/icu4c/source/i18n/japancal.cpp
index c0dd9fad0dc0..b389b4530b29 100644
--- a/icu4c/source/i18n/japancal.cpp
+++ b/icu4c/source/i18n/japancal.cpp
@@ -115,7 +115,6 @@ JapaneseCalendar::JapaneseCalendar(const Locale& aLocale, UErrorCode& success)
 :   GregorianCalendar(aLocale, success)
 {
     init(success);
-    setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
 }
 
 JapaneseCalendar::~JapaneseCalendar()
@@ -130,12 +129,6 @@ JapaneseCalendar::JapaneseCalendar(const JapaneseCalendar& source)
     U_ASSERT(U_SUCCESS(status));
 }
 
-JapaneseCalendar& JapaneseCalendar::operator= ( const JapaneseCalendar& right)
-{
-    GregorianCalendar::operator=(right);
-    return *this;
-}
-
 JapaneseCalendar* JapaneseCalendar::clone() const
 {
     return new JapaneseCalendar(*this);
diff --git a/icu4c/source/i18n/japancal.h b/icu4c/source/i18n/japancal.h
index 627b12750b98..3271cbfb794a 100644
--- a/icu4c/source/i18n/japancal.h
+++ b/icu4c/source/i18n/japancal.h
@@ -104,13 +104,6 @@ class JapaneseCalendar : public GregorianCalendar {
      */
     JapaneseCalendar(const JapaneseCalendar& source);
 
-    /**
-     * Default assignment operator
-     * @param right    the object to be copied.
-     * @internal
-     */
-    JapaneseCalendar& operator=(const JapaneseCalendar& right);
-
     /**
      * Create and return a polymorphic copy of this calendar.
      * @return    return a polymorphic copy of this calendar.
diff --git a/icu4c/source/i18n/persncal.cpp b/icu4c/source/i18n/persncal.cpp
index 4ad6bc3a59f5..6675cf414c29 100644
--- a/icu4c/source/i18n/persncal.cpp
+++ b/icu4c/source/i18n/persncal.cpp
@@ -125,7 +125,6 @@ PersianCalendar* PersianCalendar::clone() const {
 PersianCalendar::PersianCalendar(const Locale& aLocale, UErrorCode& success)
   :   Calendar(TimeZone::forLocaleOrDefault(aLocale), aLocale, success)
 {
-    setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
 }
 
 PersianCalendar::PersianCalendar(const PersianCalendar& other) : Calendar(other) {
diff --git a/icu4c/source/i18n/taiwncal.cpp b/icu4c/source/i18n/taiwncal.cpp
index e6ffd71ba308..1f9480310022 100644
--- a/icu4c/source/i18n/taiwncal.cpp
+++ b/icu4c/source/i18n/taiwncal.cpp
@@ -36,7 +36,6 @@ static const int32_t kGregorianEpoch = 1970;
 TaiwanCalendar::TaiwanCalendar(const Locale& aLocale, UErrorCode& success)
 :   GregorianCalendar(aLocale, success)
 {
-    setTimeInMillis(getNow(), success); // Call this again now that the vtable is set up properly.
 }
 
 TaiwanCalendar::~TaiwanCalendar()
@@ -48,12 +47,6 @@ TaiwanCalendar::TaiwanCalendar(const TaiwanCalendar& source)
 {
 }
 
-TaiwanCalendar& TaiwanCalendar::operator= ( const TaiwanCalendar& right)
-{
-    GregorianCalendar::operator=(right);
-    return *this;
-}
-
 TaiwanCalendar* TaiwanCalendar::clone() const
 {
     return new TaiwanCalendar(*this);
diff --git a/icu4c/source/i18n/taiwncal.h b/icu4c/source/i18n/taiwncal.h
index a8fa3d1829ed..d12ab1c4a2ee 100644
--- a/icu4c/source/i18n/taiwncal.h
+++ b/icu4c/source/i18n/taiwncal.h
@@ -79,13 +79,6 @@ class TaiwanCalendar : public GregorianCalendar {
      */
     TaiwanCalendar(const TaiwanCalendar& source);
 
-    /**
-     * Default assignment operator
-     * @param right    the object to be copied.
-     * @internal
-     */
-    TaiwanCalendar& operator=(const TaiwanCalendar& right);
-
     /**
      * Create and return a polymorphic copy of this calendar.
      * @return    return a polymorphic copy of this calendar.