diff --git a/test/built-ins/Temporal/Calendar/prototype/day-of-week/plain-date-time.js b/test/built-ins/Temporal/Calendar/prototype/day-of-week/plain-date-time.js
new file mode 100644
index 0000000000..0b12240785
--- /dev/null
+++ b/test/built-ins/Temporal/Calendar/prototype/day-of-week/plain-date-time.js
@@ -0,0 +1,34 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofweek
+description: Temporal.Calendar.prototype.dayOfWeek will take Temporal.PlainDateTime objects
+  and return the day of week.
+
+info: |
+  1. Let calendar be the this value.
+  2. Perform ? RequireInternalSlot(calendar, [[InitializedTemporalCalendar]]).
+  3. Assert: calendar.[[Identifier]] is "iso8601".
+  4. Let temporalDate be ? ToTemporalDate(temporalDateLike).
+  5. Return 𝔽(! ToISODayOfWeek(temporalDate.[[ISOYear]], temporalDate.[[ISOMonth]], temporalDate.[[ISODay]])).
+features: [Temporal]
+---*/
+let cal = new Temporal.Calendar("iso8601");
+
+assert.sameValue(4, cal.dayOfWeek(new Temporal.PlainDateTime(1997, 1, 23, 5, 30, 13)));
+// leap year
+assert.sameValue(5, cal.dayOfWeek(new Temporal.PlainDateTime(1996, 2, 23, 5, 30, 13)));
+assert.sameValue(3, cal.dayOfWeek(new Temporal.PlainDateTime(2000, 2, 23, 5, 30, 13)));
+// non leap year
+assert.sameValue(7, cal.dayOfWeek(new Temporal.PlainDateTime(1997, 2, 23, 5, 30, 13)));
+assert.sameValue(7, cal.dayOfWeek(new Temporal.PlainDateTime(1997, 3, 23, 5, 30, 13)));
+assert.sameValue(3, cal.dayOfWeek(new Temporal.PlainDateTime(1997, 4, 23, 5, 30, 13)));
+assert.sameValue(5, cal.dayOfWeek(new Temporal.PlainDateTime(1997, 5, 23, 5, 30, 13)));
+assert.sameValue(1, cal.dayOfWeek(new Temporal.PlainDateTime(1997, 6, 23, 5, 30, 13)));
+assert.sameValue(3, cal.dayOfWeek(new Temporal.PlainDateTime(1997, 7, 23, 5, 30, 13)));
+assert.sameValue(6, cal.dayOfWeek(new Temporal.PlainDateTime(1997, 8, 23, 5, 30, 13)));
+assert.sameValue(2, cal.dayOfWeek(new Temporal.PlainDateTime(1997, 9, 23, 5, 30, 13)));
+assert.sameValue(4, cal.dayOfWeek(new Temporal.PlainDateTime(1997, 10, 23, 5, 30, 13)));
+assert.sameValue(7, cal.dayOfWeek(new Temporal.PlainDateTime(1997, 11, 23, 5, 30, 13)));
+assert.sameValue(2, cal.dayOfWeek(new Temporal.PlainDateTime(1997, 12, 23, 5, 30, 13)));
diff --git a/test/built-ins/Temporal/Calendar/prototype/day-of-week/plain-date.js b/test/built-ins/Temporal/Calendar/prototype/day-of-week/plain-date.js
new file mode 100644
index 0000000000..34f7da6d02
--- /dev/null
+++ b/test/built-ins/Temporal/Calendar/prototype/day-of-week/plain-date.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofweek
+description: Temporal.Calendar.prototype.dayOfWeek will take Temporal.PlainDate objects
+  and return the day of week.
+
+info: |
+  1. Let calendar be the this value.
+  2. Perform ? RequireInternalSlot(calendar, [[InitializedTemporalCalendar]]).
+  3. Assert: calendar.[[Identifier]] is "iso8601".
+  4. Let temporalDate be ? ToTemporalDate(temporalDateLike).
+  5. Return 𝔽(! ToISODayOfWeek(temporalDate.[[ISOYear]], temporalDate.[[ISOMonth]], temporalDate.[[ISODay]])).
+features: [Temporal]
+---*/
+let cal = new Temporal.Calendar("iso8601");
+
+assert.sameValue(4, cal.dayOfWeek(new Temporal.PlainDate(1970, 1, 1)));
+assert.sameValue(6, cal.dayOfWeek(new Temporal.PlainDate(2000, 1, 1)));
+
+assert.sameValue(5, cal.dayOfWeek(new Temporal.PlainDate(2021, 1, 15)));
+// leap year
+assert.sameValue(6, cal.dayOfWeek(new Temporal.PlainDate(2020, 2, 15)));
+assert.sameValue(2, cal.dayOfWeek(new Temporal.PlainDate(2000, 2, 15)));
+// non-leap year
+assert.sameValue(1, cal.dayOfWeek(new Temporal.PlainDate(2021, 2, 15)));
+assert.sameValue(1, cal.dayOfWeek(new Temporal.PlainDate(2021, 3, 15)));
+assert.sameValue(4, cal.dayOfWeek(new Temporal.PlainDate(2021, 4, 15)));
+assert.sameValue(6, cal.dayOfWeek(new Temporal.PlainDate(2021, 5, 15)));
+assert.sameValue(2, cal.dayOfWeek(new Temporal.PlainDate(2021, 6, 15)));
+assert.sameValue(4, cal.dayOfWeek(new Temporal.PlainDate(2021, 7, 15)));
+assert.sameValue(7, cal.dayOfWeek(new Temporal.PlainDate(2021, 8, 15)));
+assert.sameValue(3, cal.dayOfWeek(new Temporal.PlainDate(2021, 9, 15)));
+assert.sameValue(5, cal.dayOfWeek(new Temporal.PlainDate(2021, 10, 15)));
+assert.sameValue(1, cal.dayOfWeek(new Temporal.PlainDate(2021, 11, 15)));
+assert.sameValue(3, cal.dayOfWeek(new Temporal.PlainDate(2021, 12, 15)));
diff --git a/test/built-ins/Temporal/Calendar/prototype/day-of-week/string.js b/test/built-ins/Temporal/Calendar/prototype/day-of-week/string.js
new file mode 100644
index 0000000000..4b42a87f9a
--- /dev/null
+++ b/test/built-ins/Temporal/Calendar/prototype/day-of-week/string.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofweek
+description: Temporal.Calendar.prototype.dayOfWeek will take ISO8601 string
+  and return the day of week.
+
+info: |
+  1. Let calendar be the this value.
+  2. Perform ? RequireInternalSlot(calendar, [[InitializedTemporalCalendar]]).
+  3. Assert: calendar.[[Identifier]] is "iso8601".
+  4. Let temporalDate be ? ToTemporalDate(temporalDateLike).
+  5. Return 𝔽(! ToISODayOfWeek(temporalDate.[[ISOYear]], temporalDate.[[ISOMonth]], temporalDate.[[ISODay]])).
+features: [Temporal]
+---*/
+let cal = new Temporal.Calendar("iso8601");
+
+assert.sameValue(5, cal.dayOfWeek("2019-01-18"));
+// leap year
+assert.sameValue(2, cal.dayOfWeek("2020-02-18"));
+// non leap
+assert.sameValue(1, cal.dayOfWeek("2019-02-18"));
+assert.sameValue(1, cal.dayOfWeek("2019-03-18"));
+assert.sameValue(4, cal.dayOfWeek("2019-04-18"));
+assert.sameValue(6, cal.dayOfWeek("2019-05-18"));
+assert.sameValue(2, cal.dayOfWeek("2019-06-18"));
+assert.sameValue(4, cal.dayOfWeek("2019-07-18"));
+assert.sameValue(7, cal.dayOfWeek("2019-08-18"));
+assert.sameValue(3, cal.dayOfWeek("2019-09-18"));
+assert.sameValue(5, cal.dayOfWeek("2019-10-18"));
+assert.sameValue(1, cal.dayOfWeek("2019-11-18"));
+assert.sameValue(3, cal.dayOfWeek("2019-12-18"));
diff --git a/test/built-ins/Temporal/Calendar/prototype/day-of-year/plain-date-time.js b/test/built-ins/Temporal/Calendar/prototype/day-of-year/plain-date-time.js
new file mode 100644
index 0000000000..f90e7ec44d
--- /dev/null
+++ b/test/built-ins/Temporal/Calendar/prototype/day-of-year/plain-date-time.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofyear
+description: Temporal.Calendar.prototype.dayOfYear will take PlainDateTime object and
+return the day of year.
+  and return Array of the same content.
+info: |
+  1. Let calendar be the this value.
+  2. Perform ? RequireInternalSlot(calendar, [[InitializedTemporalCalendar]]).
+  3. Assert: calendar.[[Identifier]] is "iso8601".
+  4. Let temporalDate be ? ToTemporalDate(temporalDateLike).
+  5. Return 𝔽(! ToISODayOfYear(temporalDate.[[ISOYear]], temporalDate.[[ISOMonth]], temporalDate.[[ISODay]])).
+features: [Temporal]
+---*/
+let cal = new Temporal.Calendar("iso8601");
+
+assert.sameValue(23, cal.dayOfYear(new Temporal.PlainDateTime(1997, 1, 23, 5, 30, 13)));
+assert.sameValue(54, cal.dayOfYear(new Temporal.PlainDateTime(1997, 2, 23, 5, 30, 13)));
+assert.sameValue(83, cal.dayOfYear(new Temporal.PlainDateTime(1996, 3, 23, 5, 30, 13)));
+assert.sameValue(82, cal.dayOfYear(new Temporal.PlainDateTime(1997, 3, 23, 5, 30, 13)));
+assert.sameValue(365, cal.dayOfYear(new Temporal.PlainDateTime(1997, 12, 31, 5, 30, 13)));
+assert.sameValue(366, cal.dayOfYear(new Temporal.PlainDateTime(1996, 12, 31, 5, 30, 13)));
diff --git a/test/built-ins/Temporal/Calendar/prototype/day-of-year/plain-date.js b/test/built-ins/Temporal/Calendar/prototype/day-of-year/plain-date.js
new file mode 100644
index 0000000000..5e80fa49e8
--- /dev/null
+++ b/test/built-ins/Temporal/Calendar/prototype/day-of-year/plain-date.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofyear
+description: Temporal.Calendar.prototype.dayOfYear will take PlainDate object and
+return the day of year.
+  and return Array of the same content.
+info: |
+  1. Let calendar be the this value.
+  2. Perform ? RequireInternalSlot(calendar, [[InitializedTemporalCalendar]]).
+  3. Assert: calendar.[[Identifier]] is "iso8601".
+  4. Let temporalDate be ? ToTemporalDate(temporalDateLike).
+  5. Return 𝔽(! ToISODayOfYear(temporalDate.[[ISOYear]], temporalDate.[[ISOMonth]], temporalDate.[[ISODay]])).
+features: [Temporal]
+---*/
+let cal = new Temporal.Calendar("iso8601");
+
+assert.sameValue(1, cal.dayOfYear(new Temporal.PlainDate(1970, 1, 1)));
+assert.sameValue(1, cal.dayOfYear(new Temporal.PlainDate(2000, 1, 1)));
+
+assert.sameValue(15, cal.dayOfYear(new Temporal.PlainDate(2021, 1, 15)));
+assert.sameValue(46, cal.dayOfYear(new Temporal.PlainDate(2020, 2, 15)));
+assert.sameValue(46, cal.dayOfYear(new Temporal.PlainDate(2000, 2, 15)));
+assert.sameValue(75, cal.dayOfYear(new Temporal.PlainDate(2020, 3, 15)));
+assert.sameValue(75, cal.dayOfYear(new Temporal.PlainDate(2000, 3, 15)));
+assert.sameValue(74, cal.dayOfYear(new Temporal.PlainDate(2001, 3, 15)));
+assert.sameValue(366, cal.dayOfYear(new Temporal.PlainDate(2000, 12, 31)));
+assert.sameValue(365, cal.dayOfYear(new Temporal.PlainDate(2001, 12, 31)));
diff --git a/test/built-ins/Temporal/Calendar/prototype/day-of-year/string.js b/test/built-ins/Temporal/Calendar/prototype/day-of-year/string.js
new file mode 100644
index 0000000000..9c39583bd2
--- /dev/null
+++ b/test/built-ins/Temporal/Calendar/prototype/day-of-year/string.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.dayofyear
+description: Temporal.Calendar.prototype.dayOfYear will take ISO8601 string and
+return the day of year.
+  and return Array of the same content.
+info: |
+  1. Let calendar be the this value.
+  2. Perform ? RequireInternalSlot(calendar, [[InitializedTemporalCalendar]]).
+  3. Assert: calendar.[[Identifier]] is "iso8601".
+  4. Let temporalDate be ? ToTemporalDate(temporalDateLike).
+  5. Return 𝔽(! ToISODayOfYear(temporalDate.[[ISOYear]], temporalDate.[[ISOMonth]], temporalDate.[[ISODay]])).
+features: [Temporal]
+---*/
+let cal = new Temporal.Calendar("iso8601");
+
+assert.sameValue(18, cal.dayOfYear("2019-01-18"));
+assert.sameValue(49, cal.dayOfYear("2020-02-18"));
+assert.sameValue(365, cal.dayOfYear("2019-12-31"));
+assert.sameValue(366, cal.dayOfYear("2000-12-31"));