diff --git a/test/intl402/Temporal/PlainDate/from/dangi-calendar-dates.js b/test/intl402/Temporal/PlainDate/from/dangi-calendar-dates.js
index 98bb749462..3f8fbccf8c 100644
--- a/test/intl402/Temporal/PlainDate/from/dangi-calendar-dates.js
+++ b/test/intl402/Temporal/PlainDate/from/dangi-calendar-dates.js
@@ -33,7 +33,7 @@ const cases = {
 const dates = {
   year2000: Temporal.PlainDate.from("2000-01-01"),
   year1900: Temporal.PlainDate.from("1900-01-01"),
-  year2100: Temporal.PlainDate.from("2100-01-01")
+  year2050: Temporal.PlainDate.from("2050-01-01")
 };
 for (var [name, result] of Object.entries(cases)) {
   const date = dates[name];
diff --git a/test/intl402/Temporal/PlainDate/prototype/monthCode/chinese-calendar-dates.js b/test/intl402/Temporal/PlainDate/prototype/monthCode/chinese-calendar-dates.js
index bafa3ce0bd..62c02d0f65 100644
--- a/test/intl402/Temporal/PlainDate/prototype/monthCode/chinese-calendar-dates.js
+++ b/test/intl402/Temporal/PlainDate/prototype/monthCode/chinese-calendar-dates.js
@@ -16,7 +16,6 @@ const leapMonthCases = [
   { year: 1976, month: 9, monthCode: "M08L", day: 1, referenceYear: 1957, referenceDay: 24 },
   { year: 1979, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 24 },
   { year: 1982, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 23 },
-  { year: 1984, month: 11, monthCode: "M10L", day: 1, referenceYear: 1870, referenceDay: 23 },
   { year: 1987, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 24 },
   { year: 1990, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 1993, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 22 },
@@ -27,14 +26,12 @@ const leapMonthCases = [
   { year: 2006, month: 8, monthCode: "M07L", day: 1, referenceYear: 1968, referenceDay: 24 },
   { year: 2009, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 2012, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 21 },
-  { year: 2014, month: 10, monthCode: "M09L", day: 1, referenceYear: 1832, referenceDay: 24 },
   { year: 2017, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 23 },
   { year: 2020, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 23 },
   { year: 2023, month: 3, monthCode: "M02L", day: 1, referenceYear: 1947, referenceDay: 22 },
   { year: 2025, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 25 },
   { year: 2028, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 2031, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 22 },
-  { year: 2033, month: 12, monthCode: "M11L", day: 1, referenceYear: 1813, referenceDay: 22 },
   { year: 2036, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 23 },
   { year: 2039, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 22 },
   { year: 2042, month: 3, monthCode: "M02L", day: 1, referenceYear: 1947, referenceDay: 22 },
diff --git a/test/intl402/Temporal/PlainDate/prototype/monthCode/dangi-calendar-dates.js b/test/intl402/Temporal/PlainDate/prototype/monthCode/dangi-calendar-dates.js
index d3829654ed..c79f70321e 100644
--- a/test/intl402/Temporal/PlainDate/prototype/monthCode/dangi-calendar-dates.js
+++ b/test/intl402/Temporal/PlainDate/prototype/monthCode/dangi-calendar-dates.js
@@ -16,7 +16,6 @@ const leapMonthCases = [
   { year: 1976, month: 9, monthCode: "M08L", day: 1, referenceYear: 1957, referenceDay: 24 },
   { year: 1979, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 24 },
   { year: 1982, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 23 },
-  { year: 1984, month: 11, monthCode: "M10L", day: 1, referenceYear: 1870, referenceDay: 23 },
   { year: 1987, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 26 },
   { year: 1990, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 1993, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 22 },
@@ -27,14 +26,12 @@ const leapMonthCases = [
   { year: 2006, month: 8, monthCode: "M07L", day: 1, referenceYear: 1968, referenceDay: 24 },
   { year: 2009, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 2012, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 21 },
-  { year: 2014, month: 10, monthCode: "M09L", day: 1, referenceYear: 1832, referenceDay: 24 },
   { year: 2017, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 24 },
   { year: 2020, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 23 },
   { year: 2023, month: 3, monthCode: "M02L", day: 1, referenceYear: 1947, referenceDay: 22 },
   { year: 2025, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 25 },
   { year: 2028, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 2031, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 22 },
-  { year: 2033, month: 12, monthCode: "M11L", day: 1, referenceYear: 1813, referenceDay: 22 },
   { year: 2036, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 23 },
   { year: 2039, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 22 },
   { year: 2042, month: 3, monthCode: "M02L", day: 1, referenceYear: 1947, referenceDay: 22 },
diff --git a/test/intl402/Temporal/PlainDate/prototype/with/dangi-calendar-dates.js b/test/intl402/Temporal/PlainDate/prototype/with/dangi-calendar-dates.js
index ce25ba44dc..87d9ef32f6 100644
--- a/test/intl402/Temporal/PlainDate/prototype/with/dangi-calendar-dates.js
+++ b/test/intl402/Temporal/PlainDate/prototype/with/dangi-calendar-dates.js
@@ -25,8 +25,8 @@ const cases = {
     day: 1,
     calendar
   },
-  year2100: {
-    year: 2099,
+  year2050: {
+    year: 2049,
     month: 11,
     day: 21,
     calendar
diff --git a/test/intl402/Temporal/PlainDateTime/prototype/monthCode/chinese-calendar-dates.js b/test/intl402/Temporal/PlainDateTime/prototype/monthCode/chinese-calendar-dates.js
index b8449e1d36..3c5d383698 100644
--- a/test/intl402/Temporal/PlainDateTime/prototype/monthCode/chinese-calendar-dates.js
+++ b/test/intl402/Temporal/PlainDateTime/prototype/monthCode/chinese-calendar-dates.js
@@ -16,7 +16,6 @@ const leapMonthCases = [
   { year: 1976, month: 9, monthCode: "M08L", day: 1, referenceYear: 1957, referenceDay: 24 },
   { year: 1979, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 24 },
   { year: 1982, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 23 },
-  { year: 1984, month: 11, monthCode: "M10L", day: 1, referenceYear: 1870, referenceDay: 23 },
   { year: 1987, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 24 },
   { year: 1990, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 1993, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 22 },
@@ -27,14 +26,12 @@ const leapMonthCases = [
   { year: 2006, month: 8, monthCode: "M07L", day: 1, referenceYear: 1968, referenceDay: 24 },
   { year: 2009, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 2012, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 21 },
-  { year: 2014, month: 10, monthCode: "M09L", day: 1, referenceYear: 1832, referenceDay: 24 },
   { year: 2017, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 23 },
   { year: 2020, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 23 },
   { year: 2023, month: 3, monthCode: "M02L", day: 1, referenceYear: 1947, referenceDay: 22 },
   { year: 2025, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 25 },
   { year: 2028, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 2031, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 22 },
-  { year: 2033, month: 12, monthCode: "M11L", day: 1, referenceYear: 1813, referenceDay: 22 },
   { year: 2036, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 23 },
   { year: 2039, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 22 },
   { year: 2042, month: 3, monthCode: "M02L", day: 1, referenceYear: 1947, referenceDay: 22 },
diff --git a/test/intl402/Temporal/PlainDateTime/prototype/monthCode/dangi-calendar-dates.js b/test/intl402/Temporal/PlainDateTime/prototype/monthCode/dangi-calendar-dates.js
index 8e168b6440..1ef3a65dc7 100644
--- a/test/intl402/Temporal/PlainDateTime/prototype/monthCode/dangi-calendar-dates.js
+++ b/test/intl402/Temporal/PlainDateTime/prototype/monthCode/dangi-calendar-dates.js
@@ -16,7 +16,6 @@ const leapMonthCases = [
   { year: 1976, month: 9, monthCode: "M08L", day: 1, referenceYear: 1957, referenceDay: 24 },
   { year: 1979, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 24 },
   { year: 1982, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 23 },
-  { year: 1984, month: 11, monthCode: "M10L", day: 1, referenceYear: 1870, referenceDay: 23 },
   { year: 1987, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 26 },
   { year: 1990, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 1993, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 22 },
@@ -27,14 +26,12 @@ const leapMonthCases = [
   { year: 2006, month: 8, monthCode: "M07L", day: 1, referenceYear: 1968, referenceDay: 24 },
   { year: 2009, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 2012, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 21 },
-  { year: 2014, month: 10, monthCode: "M09L", day: 1, referenceYear: 1832, referenceDay: 24 },
   { year: 2017, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 24 },
   { year: 2020, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 23 },
   { year: 2023, month: 3, monthCode: "M02L", day: 1, referenceYear: 1947, referenceDay: 22 },
   { year: 2025, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 25 },
   { year: 2028, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 2031, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 22 },
-  { year: 2033, month: 12, monthCode: "M11L", day: 1, referenceYear: 1813, referenceDay: 22 },
   { year: 2036, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 23 },
   { year: 2039, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 22 },
   { year: 2042, month: 3, monthCode: "M02L", day: 1, referenceYear: 1947, referenceDay: 22 },
diff --git a/test/intl402/Temporal/PlainDateTime/prototype/with/dangi-calendar-dates.js b/test/intl402/Temporal/PlainDateTime/prototype/with/dangi-calendar-dates.js
index 78daee0f7e..1d01a31d76 100644
--- a/test/intl402/Temporal/PlainDateTime/prototype/with/dangi-calendar-dates.js
+++ b/test/intl402/Temporal/PlainDateTime/prototype/with/dangi-calendar-dates.js
@@ -25,8 +25,8 @@ const cases = {
     day: 1,
     calendar
   },
-  year2100: {
-    year: 2099,
+  year2050: {
+    year: 2049,
     month: 11,
     day: 21,
     calendar
diff --git a/test/intl402/Temporal/ZonedDateTime/prototype/monthCode/chinese-calendar-dates.js b/test/intl402/Temporal/ZonedDateTime/prototype/monthCode/chinese-calendar-dates.js
index ca6d975120..e361907239 100644
--- a/test/intl402/Temporal/ZonedDateTime/prototype/monthCode/chinese-calendar-dates.js
+++ b/test/intl402/Temporal/ZonedDateTime/prototype/monthCode/chinese-calendar-dates.js
@@ -16,7 +16,6 @@ const leapMonthCases = [
   { year: 1976, month: 9, monthCode: "M08L", day: 1, referenceYear: 1957, referenceDay: 24 },
   { year: 1979, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 24 },
   { year: 1982, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 23 },
-  { year: 1984, month: 11, monthCode: "M10L", day: 1, referenceYear: 1870, referenceDay: 23 },
   { year: 1987, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 24 },
   { year: 1990, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 1993, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 22 },
@@ -27,14 +26,12 @@ const leapMonthCases = [
   { year: 2006, month: 8, monthCode: "M07L", day: 1, referenceYear: 1968, referenceDay: 24 },
   { year: 2009, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 2012, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 21 },
-  { year: 2014, month: 10, monthCode: "M09L", day: 1, referenceYear: 1832, referenceDay: 24 },
   { year: 2017, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 23 },
   { year: 2020, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 23 },
   { year: 2023, month: 3, monthCode: "M02L", day: 1, referenceYear: 1947, referenceDay: 22 },
   { year: 2025, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 25 },
   { year: 2028, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 2031, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 22 },
-  { year: 2033, month: 12, monthCode: "M11L", day: 1, referenceYear: 1813, referenceDay: 22 },
   { year: 2036, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 23 },
   { year: 2039, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 22 },
   { year: 2042, month: 3, monthCode: "M02L", day: 1, referenceYear: 1947, referenceDay: 22 },
diff --git a/test/intl402/Temporal/ZonedDateTime/prototype/monthCode/dangi-calendar-dates.js b/test/intl402/Temporal/ZonedDateTime/prototype/monthCode/dangi-calendar-dates.js
index 776f29e004..b1ad544f10 100644
--- a/test/intl402/Temporal/ZonedDateTime/prototype/monthCode/dangi-calendar-dates.js
+++ b/test/intl402/Temporal/ZonedDateTime/prototype/monthCode/dangi-calendar-dates.js
@@ -16,7 +16,6 @@ const leapMonthCases = [
   { year: 1976, month: 9, monthCode: "M08L", day: 1, referenceYear: 1957, referenceDay: 24 },
   { year: 1979, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 24 },
   { year: 1982, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 23 },
-  { year: 1984, month: 11, monthCode: "M10L", day: 1, referenceYear: 1870, referenceDay: 23 },
   { year: 1987, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 26 },
   { year: 1990, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 1993, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 22 },
@@ -27,14 +26,12 @@ const leapMonthCases = [
   { year: 2006, month: 8, monthCode: "M07L", day: 1, referenceYear: 1968, referenceDay: 24 },
   { year: 2009, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 2012, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 21 },
-  { year: 2014, month: 10, monthCode: "M09L", day: 1, referenceYear: 1832, referenceDay: 24 },
   { year: 2017, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 24 },
   { year: 2020, month: 5, monthCode: "M04L", day: 1, referenceYear: 1963, referenceDay: 23 },
   { year: 2023, month: 3, monthCode: "M02L", day: 1, referenceYear: 1947, referenceDay: 22 },
   { year: 2025, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 25 },
   { year: 2028, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 23 },
   { year: 2031, month: 4, monthCode: "M03L", day: 1, referenceYear: 1966, referenceDay: 22 },
-  { year: 2033, month: 12, monthCode: "M11L", day: 1, referenceYear: 1813, referenceDay: 22 },
   { year: 2036, month: 7, monthCode: "M06L", day: 1, referenceYear: 1960, referenceDay: 23 },
   { year: 2039, month: 6, monthCode: "M05L", day: 1, referenceYear: 1971, referenceDay: 22 },
   { year: 2042, month: 3, monthCode: "M02L", day: 1, referenceYear: 1947, referenceDay: 22 },
diff --git a/test/intl402/Temporal/ZonedDateTime/prototype/with/dangi-calendar-dates.js b/test/intl402/Temporal/ZonedDateTime/prototype/with/dangi-calendar-dates.js
index 2f4074dc06..0006b84e5e 100644
--- a/test/intl402/Temporal/ZonedDateTime/prototype/with/dangi-calendar-dates.js
+++ b/test/intl402/Temporal/ZonedDateTime/prototype/with/dangi-calendar-dates.js
@@ -27,8 +27,8 @@ const cases = {
     timeZone: "UTC",
     calendar
   },
-  year2100: {
-    year: 2099,
+  year2050: {
+    year: 2049,
     month: 11,
     day: 21,
     timeZone: "UTC",