diff --git a/v2/jp/jp_holidays.go b/v2/jp/jp_holidays.go
new file mode 100644
index 0000000..4131727
--- /dev/null
+++ b/v2/jp/jp_holidays.go
@@ -0,0 +1,354 @@
+// (c) Rick Arnold. Licensed under the BSD license (see LICENSE).
+
+// Package jp provides holiday definitions for Japan.
+package jp
+
+import (
+	"github.com/rickar/cal/v2"
+	"github.com/rickar/cal/v2/aa"
+	"math"
+	"time"
+)
+
+var (
+	// Standard Japan weekend substitution rules: Sundays move to Monday
+	weekendAlt = []cal.AltDay{
+		{Day: time.Sunday, Offset: 1},
+	}
+
+	// NewYear represents New Year's Day on 1-Jan
+	NewYear = aa.NewYear.Clone(&cal.Holiday{Type: cal.ObservancePublic, Observed: weekendAlt})
+
+	// ComingOfAgeDay represents Coming of Age Day on the 2nd Monday in January
+	ComingOfAgeDay = &cal.Holiday{
+		Name:    "Coming of Age Day",
+		Type:    cal.ObservancePublic,
+		Month:   time.January,
+		Weekday: time.Monday,
+		Offset:  2,
+		Func:    cal.CalcWeekdayOffset,
+	}
+
+	// NationalFoundationDay represents National Foundation Day on 11-February
+	NationalFoundationDay = &cal.Holiday{
+		Name:     "National Foundation Day",
+		Type:     cal.ObservancePublic,
+		Month:    time.February,
+		Day:      11,
+		Observed: weekendAlt,
+		Func:     cal.CalcDayOfMonth,
+	}
+
+	// TheEmperorsBirthday represents The Emperor's Birthday on 23-February
+	TheEmperorsBirthday = &cal.Holiday{
+		Name:     "The Emperor's Birthday",
+		Type:     cal.ObservancePublic,
+		Month:    time.February,
+		Day:      23,
+		Observed: weekendAlt,
+		Func: func(h *cal.Holiday, year int) time.Time {
+			if year <= 2019 {
+				// Emperor Akihito abdicated in 2019.
+				holiday := *h
+				holiday.Month = time.December
+				holiday.Day = 23
+
+				return cal.CalcDayOfMonth(&holiday, year)
+			}
+
+			return cal.CalcDayOfMonth(h, year)
+		},
+	}
+
+	// VernalEquinoxDay represents Vernal Equinox Day on Around 20-March
+	VernalEquinoxDay = &cal.Holiday{
+		Name:     "Vernal Equinox Day",
+		Type:     cal.ObservancePublic,
+		Month:    time.March,
+		Observed: weekendAlt,
+		Func: func(h *cal.Holiday, year int) time.Time {
+			holiday := h
+			holiday.Day = calcVernalEquinoxDate(year)
+
+			return cal.CalcDayOfMonth(holiday, year)
+		},
+	}
+
+	// ShowaDay represents Showa Day on 29-April
+	ShowaDay = &cal.Holiday{
+		Name:     "Showa Day",
+		Type:     cal.ObservancePublic,
+		Month:    time.April,
+		Day:      29,
+		Observed: weekendAlt,
+		Func:     cal.CalcDayOfMonth,
+	}
+
+	// ConstitutionMemorialDay represents Constitution Memorial Day on 3-May
+	ConstitutionMemorialDay = &cal.Holiday{
+		Name:  "Constitution Memorial Day",
+		Type:  cal.ObservancePublic,
+		Month: time.May,
+		Day:   3,
+		Observed: []cal.AltDay{
+			{Day: time.Sunday, Offset: 3},
+		},
+		Func: cal.CalcDayOfMonth,
+	}
+
+	// GreeneryDay represents Greenery Day on 4-May
+	GreeneryDay = &cal.Holiday{
+		Name:  "Greenery Day",
+		Type:  cal.ObservancePublic,
+		Month: time.May,
+		Day:   4,
+		Observed: []cal.AltDay{
+			{Day: time.Sunday, Offset: 2},
+		},
+		Func: cal.CalcDayOfMonth,
+	}
+
+	// ChildrensDay represents Children's Day on 5-May
+	ChildrensDay = &cal.Holiday{
+		Name:     "Children's Day",
+		Type:     cal.ObservancePublic,
+		Month:    time.May,
+		Day:      5,
+		Observed: weekendAlt,
+		Func:     cal.CalcDayOfMonth,
+	}
+
+	// MarineDay represents Marine Day on the 3rd Monday in July
+	MarineDay = &cal.Holiday{
+		Name:    "Marine Day",
+		Type:    cal.ObservancePublic,
+		Month:   time.July,
+		Weekday: time.Monday,
+		Offset:  3,
+		Func: func(h *cal.Holiday, year int) time.Time {
+			if year == 2020 || year == 2021 {
+				// As special arrangement for the 2020 Summer Olympics, the 2020 and 2021 date for Marine Day was moved
+				holiday := *h
+				holiday.Weekday = time.Thursday
+				holiday.Offset = 4
+
+				return cal.CalcWeekdayOffset(&holiday, year)
+			}
+
+			return cal.CalcWeekdayOffset(h, year)
+		},
+	}
+
+	// MountainDay represents Mountain Day on 11-August
+	MountainDay = &cal.Holiday{
+		Name:      "Mountain Day",
+		Type:      cal.ObservancePublic,
+		Month:     time.August,
+		Day:       11,
+		Observed:  weekendAlt,
+		Func:      cal.CalcDayOfMonth,
+		StartYear: 2016,
+	}
+
+	// RespectForTheAgedDay represents Respect for the Aged Day on the 3rd Monday in September
+	RespectForTheAgedDay = &cal.Holiday{
+		Name:    "Respect for the Aged Day",
+		Type:    cal.ObservancePublic,
+		Month:   time.September,
+		Weekday: time.Monday,
+		Offset:  3,
+		Func:    cal.CalcWeekdayOffset,
+	}
+
+	// AutumnalEquinoxDay represents Autumnal Equinox Day on Around 23-September
+	AutumnalEquinoxDay = &cal.Holiday{
+		Name:     "Autumnal Equinox Day",
+		Type:     cal.ObservancePublic,
+		Month:    time.September,
+		Observed: weekendAlt,
+		Func: func(h *cal.Holiday, year int) time.Time {
+			holiday := *h
+			holiday.Day = calcAutumnalEquinoxDate(year)
+
+			return cal.CalcDayOfMonth(&holiday, year)
+		},
+	}
+
+	// SportsDay represents Sports Day on the 2nd Monday in October
+	SportsDay = &cal.Holiday{
+		Name:    "Sports Day",
+		Type:    cal.ObservancePublic,
+		Month:   time.October,
+		Weekday: time.Monday,
+		Offset:  2,
+		Func: func(h *cal.Holiday, year int) time.Time {
+			if year == 2020 || year == 2021 {
+				// As special arrangement for the 2020 Summer Olympics, the 2020 and 2021 date for Sports Day was moved
+				holiday := *h
+				holiday.Month = time.July
+				holiday.Weekday = time.Friday
+				holiday.Offset = 4
+
+				return cal.CalcWeekdayOffset(&holiday, year)
+			}
+
+			return cal.CalcWeekdayOffset(h, year)
+		},
+	}
+
+	// CultureDay represents Culture Day on 3-November
+	CultureDay = &cal.Holiday{
+		Name:     "Culture Day",
+		Type:     cal.ObservancePublic,
+		Month:    time.November,
+		Day:      3,
+		Observed: weekendAlt,
+		Func:     cal.CalcDayOfMonth,
+	}
+
+	// LaborThanksgivingDay represents Labor Thanksgiving Day on 23-November
+	LaborThanksgivingDay = &cal.Holiday{
+		Name:     "Labor Thanksgiving Day",
+		Type:     cal.ObservancePublic,
+		Month:    time.November,
+		Day:      23,
+		Observed: weekendAlt,
+		Func:     cal.CalcDayOfMonth,
+	}
+
+	// NationalHolidayBetweenRespectForTheAgedDayAndAutumnalEquinoxDay represents National holiday between Respect for the Aged Day and Autumnal Equinox Day in September
+	NationalHolidayBetweenRespectForTheAgedDayAndAutumnalEquinoxDay = &cal.Holiday{
+		Name:  "National holiday between Respect for the Aged Day and Autumnal Equinox Day",
+		Type:  cal.ObservancePublic,
+		Month: time.September,
+		Func: func(h *cal.Holiday, year int) time.Time {
+			switch year {
+			// only dates in September 2009 - 2032 are supported
+			case 2009:
+				return time.Date(year, h.Month, 22, 0, 0, 0, 0, cal.DefaultLoc)
+			case 2015:
+				return time.Date(year, h.Month, 22, 0, 0, 0, 0, cal.DefaultLoc)
+			case 2026:
+				return time.Date(year, h.Month, 22, 0, 0, 0, 0, cal.DefaultLoc)
+			case 2032:
+				return time.Date(year, h.Month, 21, 0, 0, 0, 0, cal.DefaultLoc)
+			default:
+				return time.Time{}
+			}
+		},
+	}
+
+	// NationalHolidayBetweenShowaDayAndNewEmperorEnthronementDay represents
+	// National Holiday Between Showa Day And New Emperor Enthronement Day on 30-April 2019
+	NationalHolidayBetweenShowaDayAndNewEmperorEnthronementDay = &cal.Holiday{
+		Name:      "National Holiday Between Showa Day And New Emperor Enthronement Day",
+		Type:      cal.ObservancePublic,
+		Month:     time.April,
+		Day:       30,
+		Func:      cal.CalcDayOfMonth,
+		StartYear: 2019,
+		EndYear:   2019,
+	}
+
+	// TheNewEmperorEnthronementDay represents The New Emperor Enthronement Day on 1-May 2019
+	TheNewEmperorEnthronementDay = &cal.Holiday{
+		Name:      "New Emperor Enthronement Day",
+		Type:      cal.ObservancePublic,
+		Month:     time.May,
+		Day:       1,
+		Func:      cal.CalcDayOfMonth,
+		StartYear: 2019,
+		EndYear:   2019,
+	}
+
+	// NationalHolidayBetweenTheNewEmperorEnthronementDayAndConstitutionMemorialDay represents
+	// National holiday between The New Emperor Enthronement Day and Constitution Memorial Day on 2-May 2019
+	NationalHolidayBetweenTheNewEmperorEnthronementDayAndConstitutionMemorialDay = &cal.Holiday{
+		Name:      "National holiday between New Emperor Enthronement Day and Constitution Memorial Day",
+		Type:      cal.ObservancePublic,
+		Month:     time.May,
+		Day:       2,
+		Func:      cal.CalcDayOfMonth,
+		StartYear: 2019,
+		EndYear:   2019,
+	}
+
+	// TheNewEmperorEnthronementCeremony represents The New Emperor Enthronement Day on 22-October 2019
+	TheNewEmperorEnthronementCeremony = &cal.Holiday{
+		Name:      "The New Emperor Enthronement Ceremony",
+		Type:      cal.ObservancePublic,
+		Month:     time.October,
+		Day:       22,
+		Func:      cal.CalcDayOfMonth,
+		StartYear: 2019,
+		EndYear:   2019,
+	}
+
+	exceptionalNationalHolidays = []*cal.Holiday{
+		NationalHolidayBetweenRespectForTheAgedDayAndAutumnalEquinoxDay,
+		NationalHolidayBetweenShowaDayAndNewEmperorEnthronementDay,
+		TheNewEmperorEnthronementDay,
+		NationalHolidayBetweenTheNewEmperorEnthronementDayAndConstitutionMemorialDay,
+		TheNewEmperorEnthronementCeremony,
+	}
+
+	Holidays = append(
+		[]*cal.Holiday{
+			NewYear,
+			ComingOfAgeDay,
+			NationalFoundationDay,
+			TheEmperorsBirthday,
+			VernalEquinoxDay,
+			ShowaDay,
+			ConstitutionMemorialDay,
+			GreeneryDay,
+			ChildrensDay,
+			MarineDay,
+			MountainDay,
+			RespectForTheAgedDay,
+			AutumnalEquinoxDay,
+			SportsDay,
+			CultureDay,
+			LaborThanksgivingDay,
+		},
+		exceptionalNationalHolidays...,
+	)
+)
+
+func calcVernalEquinoxDate(year int) int {
+	val := calcEquinoxBase(year)
+
+	switch {
+	case 1851 <= year && year <= 1899:
+		val += 19.8277
+	case 1900 <= year && year <= 1979:
+		val += 20.8357
+	case 1980 <= year && year <= 2099:
+		val += 20.8431
+	case 2100 <= year && year <= 2150:
+		val += 21.8510
+	}
+
+	return int(math.Floor(val))
+}
+
+func calcAutumnalEquinoxDate(year int) int {
+	val := calcEquinoxBase(year)
+
+	switch {
+	case 1851 <= year && year <= 1899:
+		val += 22.2588
+	case 1900 <= year && year <= 1979:
+		val += 23.2588
+	case 1980 <= year && year <= 2099:
+		val += 23.2488
+	case 2100 <= year && year <= 2150:
+		val += 24.2488
+	}
+
+	return int(math.Floor(val))
+}
+
+func calcEquinoxBase(year int) float64 {
+	return 0.242194*float64(year-1980) - math.Floor(float64(year-1980)/4.0)
+}
diff --git a/v2/jp/jp_holidays_test.go b/v2/jp/jp_holidays_test.go
new file mode 100644
index 0000000..689bee8
--- /dev/null
+++ b/v2/jp/jp_holidays_test.go
@@ -0,0 +1,223 @@
+// (c) Rick Arnold. Licensed under the BSD license (see LICENSE).
+
+package jp
+
+import (
+	"github.com/rickar/cal/v2"
+	"testing"
+	"time"
+)
+
+func d(y, m, d int) time.Time {
+	return time.Date(y, time.Month(m), d, 0, 0, 0, 0, cal.DefaultLoc)
+}
+
+func TestHolidays(t *testing.T) {
+	tests := []struct {
+		h       *cal.Holiday
+		y       int
+		wantAct time.Time
+		wantObs time.Time
+	}{
+		{NewYear, 2015, d(2015, 1, 1), d(2015, 1, 1)},
+		{NewYear, 2016, d(2016, 1, 1), d(2016, 1, 1)},
+		{NewYear, 2017, d(2017, 1, 1), d(2017, 1, 2)},
+		{NewYear, 2018, d(2018, 1, 1), d(2018, 1, 1)},
+		{NewYear, 2019, d(2019, 1, 1), d(2019, 1, 1)},
+		{NewYear, 2020, d(2020, 1, 1), d(2020, 1, 1)},
+		{NewYear, 2021, d(2021, 1, 1), d(2021, 1, 1)},
+		{NewYear, 2022, d(2022, 1, 1), d(2022, 1, 1)},
+
+		{ComingOfAgeDay, 2015, d(2015, 1, 12), d(2015, 1, 12)},
+		{ComingOfAgeDay, 2016, d(2016, 1, 11), d(2016, 1, 11)},
+		{ComingOfAgeDay, 2017, d(2017, 1, 9), d(2017, 1, 9)},
+		{ComingOfAgeDay, 2018, d(2018, 1, 8), d(2018, 1, 8)},
+		{ComingOfAgeDay, 2019, d(2019, 1, 14), d(2019, 1, 14)},
+		{ComingOfAgeDay, 2020, d(2020, 1, 13), d(2020, 1, 13)},
+		{ComingOfAgeDay, 2021, d(2021, 1, 11), d(2021, 1, 11)},
+		{ComingOfAgeDay, 2022, d(2022, 1, 10), d(2022, 1, 10)},
+
+		{NationalFoundationDay, 2015, d(2015, 2, 11), d(2015, 2, 11)},
+		{NationalFoundationDay, 2016, d(2016, 2, 11), d(2016, 2, 11)},
+		{NationalFoundationDay, 2017, d(2017, 2, 11), d(2017, 2, 11)},
+		{NationalFoundationDay, 2018, d(2018, 2, 11), d(2018, 2, 12)},
+		{NationalFoundationDay, 2019, d(2019, 2, 11), d(2019, 2, 11)},
+		{NationalFoundationDay, 2020, d(2020, 2, 11), d(2020, 2, 11)},
+		{NationalFoundationDay, 2021, d(2021, 2, 11), d(2021, 2, 11)},
+		{NationalFoundationDay, 2022, d(2022, 2, 11), d(2022, 2, 11)},
+
+		{TheEmperorsBirthday, 2015, d(2015, 12, 23), d(2015, 12, 23)},
+		{TheEmperorsBirthday, 2016, d(2016, 12, 23), d(2016, 12, 23)},
+		{TheEmperorsBirthday, 2017, d(2017, 12, 23), d(2017, 12, 23)},
+		{TheEmperorsBirthday, 2018, d(2018, 12, 23), d(2018, 12, 24)},
+		{TheEmperorsBirthday, 2019, d(2019, 12, 23), d(2019, 12, 23)},
+		{TheEmperorsBirthday, 2020, d(2020, 2, 23), d(2020, 2, 24)},
+		{TheEmperorsBirthday, 2021, d(2021, 2, 23), d(2021, 2, 23)},
+		{TheEmperorsBirthday, 2022, d(2022, 2, 23), d(2022, 2, 23)},
+
+		{VernalEquinoxDay, 1851, d(1851, 3, 21), d(1851, 3, 21)},
+		{VernalEquinoxDay, 1899, d(1899, 3, 21), d(1899, 3, 21)},
+		{VernalEquinoxDay, 1900, d(1900, 3, 21), d(1900, 3, 21)},
+		{VernalEquinoxDay, 1979, d(1979, 3, 21), d(1979, 3, 21)},
+		{VernalEquinoxDay, 1980, d(1980, 3, 20), d(1980, 3, 20)},
+		{VernalEquinoxDay, 2015, d(2015, 3, 21), d(2015, 3, 21)},
+		{VernalEquinoxDay, 2016, d(2016, 3, 20), d(2016, 3, 21)},
+		{VernalEquinoxDay, 2017, d(2017, 3, 20), d(2017, 3, 20)},
+		{VernalEquinoxDay, 2018, d(2018, 3, 21), d(2018, 3, 21)},
+		{VernalEquinoxDay, 2019, d(2019, 3, 21), d(2019, 3, 21)},
+		{VernalEquinoxDay, 2020, d(2020, 3, 20), d(2020, 3, 20)},
+		{VernalEquinoxDay, 2021, d(2021, 3, 20), d(2021, 3, 20)},
+		{VernalEquinoxDay, 2022, d(2022, 3, 21), d(2022, 3, 21)},
+		{VernalEquinoxDay, 2023, d(2023, 3, 21), d(2023, 3, 21)},
+		{VernalEquinoxDay, 2024, d(2024, 3, 20), d(2024, 3, 20)},
+		{VernalEquinoxDay, 2025, d(2025, 3, 20), d(2025, 3, 20)},
+		{VernalEquinoxDay, 2026, d(2026, 3, 20), d(2026, 3, 20)},
+		{VernalEquinoxDay, 2027, d(2027, 3, 21), d(2027, 3, 22)},
+		{VernalEquinoxDay, 2028, d(2028, 3, 20), d(2028, 3, 20)},
+		{VernalEquinoxDay, 2029, d(2029, 3, 20), d(2029, 3, 20)},
+		{VernalEquinoxDay, 2030, d(2030, 3, 20), d(2030, 3, 20)},
+		{VernalEquinoxDay, 2099, d(2099, 3, 20), d(2099, 3, 20)},
+		{VernalEquinoxDay, 2100, d(2100, 3, 20), d(2100, 3, 20)},
+		{VernalEquinoxDay, 2150, d(2150, 3, 21), d(2150, 3, 21)},
+
+		{ShowaDay, 2015, d(2015, 4, 29), d(2015, 4, 29)},
+		{ShowaDay, 2016, d(2016, 4, 29), d(2016, 4, 29)},
+		{ShowaDay, 2017, d(2017, 4, 29), d(2017, 4, 29)},
+		{ShowaDay, 2018, d(2018, 4, 29), d(2018, 4, 30)},
+		{ShowaDay, 2019, d(2019, 4, 29), d(2019, 4, 29)},
+		{ShowaDay, 2020, d(2020, 4, 29), d(2020, 4, 29)},
+		{ShowaDay, 2021, d(2021, 4, 29), d(2021, 4, 29)},
+		{ShowaDay, 2022, d(2022, 4, 29), d(2022, 4, 29)},
+
+		{ConstitutionMemorialDay, 2015, d(2015, 5, 3), d(2015, 5, 6)},
+		{ConstitutionMemorialDay, 2016, d(2016, 5, 3), d(2016, 5, 3)},
+		{ConstitutionMemorialDay, 2017, d(2017, 5, 3), d(2017, 5, 3)},
+		{ConstitutionMemorialDay, 2018, d(2018, 5, 3), d(2018, 5, 3)},
+		{ConstitutionMemorialDay, 2019, d(2019, 5, 3), d(2019, 5, 3)},
+		{ConstitutionMemorialDay, 2020, d(2020, 5, 3), d(2020, 5, 6)},
+		{ConstitutionMemorialDay, 2021, d(2021, 5, 3), d(2021, 5, 3)},
+		{ConstitutionMemorialDay, 2022, d(2022, 5, 3), d(2022, 5, 3)},
+
+		{GreeneryDay, 2014, d(2014, 5, 4), d(2014, 5, 6)},
+		{GreeneryDay, 2015, d(2015, 5, 4), d(2015, 5, 4)},
+		{GreeneryDay, 2016, d(2016, 5, 4), d(2016, 5, 4)},
+		{GreeneryDay, 2017, d(2017, 5, 4), d(2017, 5, 4)},
+		{GreeneryDay, 2018, d(2018, 5, 4), d(2018, 5, 4)},
+		{GreeneryDay, 2019, d(2019, 5, 4), d(2019, 5, 4)},
+		{GreeneryDay, 2020, d(2020, 5, 4), d(2020, 5, 4)},
+		{GreeneryDay, 2021, d(2021, 5, 4), d(2021, 5, 4)},
+		{GreeneryDay, 2022, d(2022, 5, 4), d(2022, 5, 4)},
+
+		{ChildrensDay, 2015, d(2015, 5, 5), d(2015, 5, 5)},
+		{ChildrensDay, 2016, d(2016, 5, 5), d(2016, 5, 5)},
+		{ChildrensDay, 2017, d(2017, 5, 5), d(2017, 5, 5)},
+		{ChildrensDay, 2018, d(2018, 5, 5), d(2018, 5, 5)},
+		{ChildrensDay, 2019, d(2019, 5, 5), d(2019, 5, 6)},
+		{ChildrensDay, 2020, d(2020, 5, 5), d(2020, 5, 5)},
+		{ChildrensDay, 2021, d(2021, 5, 5), d(2021, 5, 5)},
+		{ChildrensDay, 2022, d(2022, 5, 5), d(2022, 5, 5)},
+
+		{MarineDay, 2015, d(2015, 7, 20), d(2015, 7, 20)},
+		{MarineDay, 2016, d(2016, 7, 18), d(2016, 7, 18)},
+		{MarineDay, 2017, d(2017, 7, 17), d(2017, 7, 17)},
+		{MarineDay, 2018, d(2018, 7, 16), d(2018, 7, 16)},
+		{MarineDay, 2019, d(2019, 7, 15), d(2019, 7, 15)},
+		{MarineDay, 2020, d(2020, 7, 23), d(2020, 7, 23)},
+		{MarineDay, 2021, d(2021, 7, 22), d(2021, 7, 22)},
+		{MarineDay, 2022, d(2022, 7, 18), d(2022, 7, 18)},
+
+		{MountainDay, 2016, d(2016, 8, 11), d(2016, 8, 11)},
+		{MountainDay, 2017, d(2017, 8, 11), d(2017, 8, 11)},
+		{MountainDay, 2018, d(2018, 8, 11), d(2018, 8, 11)},
+		{MountainDay, 2019, d(2019, 8, 11), d(2019, 8, 12)},
+		{MountainDay, 2020, d(2020, 8, 11), d(2020, 8, 11)},
+		{MountainDay, 2021, d(2021, 8, 11), d(2021, 8, 11)},
+		{MountainDay, 2022, d(2022, 8, 11), d(2022, 8, 11)},
+
+		{RespectForTheAgedDay, 2015, d(2015, 9, 21), d(2015, 9, 21)},
+		{RespectForTheAgedDay, 2016, d(2016, 9, 19), d(2016, 9, 19)},
+		{RespectForTheAgedDay, 2017, d(2017, 9, 18), d(2017, 9, 18)},
+		{RespectForTheAgedDay, 2018, d(2018, 9, 17), d(2018, 9, 17)},
+		{RespectForTheAgedDay, 2019, d(2019, 9, 16), d(2019, 9, 16)},
+		{RespectForTheAgedDay, 2020, d(2020, 9, 21), d(2020, 9, 21)},
+		{RespectForTheAgedDay, 2021, d(2021, 9, 20), d(2021, 9, 20)},
+		{RespectForTheAgedDay, 2022, d(2022, 9, 19), d(2022, 9, 19)},
+
+		{AutumnalEquinoxDay, 1851, d(1851, 9, 24), d(1851, 9, 24)},
+		{AutumnalEquinoxDay, 1899, d(1899, 9, 23), d(1899, 9, 23)},
+		{AutumnalEquinoxDay, 1900, d(1900, 9, 23), d(1900, 9, 24)},
+		{AutumnalEquinoxDay, 1979, d(1979, 9, 24), d(1979, 9, 24)},
+		{AutumnalEquinoxDay, 1980, d(1980, 9, 23), d(1980, 9, 23)},
+		{AutumnalEquinoxDay, 2015, d(2015, 9, 23), d(2015, 9, 23)},
+		{AutumnalEquinoxDay, 2016, d(2016, 9, 22), d(2016, 9, 22)},
+		{AutumnalEquinoxDay, 2017, d(2017, 9, 23), d(2017, 9, 23)},
+		{AutumnalEquinoxDay, 2018, d(2018, 9, 23), d(2018, 9, 24)},
+		{AutumnalEquinoxDay, 2019, d(2019, 9, 23), d(2019, 9, 23)},
+		{AutumnalEquinoxDay, 2020, d(2020, 9, 22), d(2020, 9, 22)},
+		{AutumnalEquinoxDay, 2021, d(2021, 9, 23), d(2021, 9, 23)},
+		{AutumnalEquinoxDay, 2022, d(2022, 9, 23), d(2022, 9, 23)},
+		{AutumnalEquinoxDay, 2023, d(2023, 9, 23), d(2023, 9, 23)},
+		{AutumnalEquinoxDay, 2024, d(2024, 9, 22), d(2024, 9, 23)},
+		{AutumnalEquinoxDay, 2025, d(2025, 9, 23), d(2025, 9, 23)},
+		{AutumnalEquinoxDay, 2026, d(2026, 9, 23), d(2026, 9, 23)},
+		{AutumnalEquinoxDay, 2027, d(2027, 9, 23), d(2027, 9, 23)},
+		{AutumnalEquinoxDay, 2028, d(2028, 9, 22), d(2028, 9, 22)},
+		{AutumnalEquinoxDay, 2029, d(2029, 9, 23), d(2029, 9, 24)},
+		{AutumnalEquinoxDay, 2030, d(2030, 9, 23), d(2030, 9, 23)},
+		{AutumnalEquinoxDay, 2099, d(2099, 9, 23), d(2099, 9, 23)},
+		{AutumnalEquinoxDay, 2100, d(2100, 9, 23), d(2100, 9, 23)},
+		{AutumnalEquinoxDay, 2150, d(2150, 9, 23), d(2150, 9, 23)},
+
+		{SportsDay, 2015, d(2015, 10, 12), d(2015, 10, 12)},
+		{SportsDay, 2016, d(2016, 10, 10), d(2016, 10, 10)},
+		{SportsDay, 2017, d(2017, 10, 9), d(2017, 10, 9)},
+		{SportsDay, 2018, d(2018, 10, 8), d(2018, 10, 8)},
+		{SportsDay, 2019, d(2019, 10, 14), d(2019, 10, 14)},
+		{SportsDay, 2020, d(2020, 7, 24), d(2020, 7, 24)},
+		{SportsDay, 2021, d(2021, 7, 23), d(2021, 7, 23)},
+		{SportsDay, 2022, d(2022, 10, 10), d(2022, 10, 10)},
+
+		{CultureDay, 2015, d(2015, 11, 3), d(2015, 11, 3)},
+		{CultureDay, 2016, d(2016, 11, 3), d(2016, 11, 3)},
+		{CultureDay, 2017, d(2017, 11, 3), d(2017, 11, 3)},
+		{CultureDay, 2018, d(2018, 11, 3), d(2018, 11, 3)},
+		{CultureDay, 2019, d(2019, 11, 3), d(2019, 11, 4)},
+		{CultureDay, 2020, d(2020, 11, 3), d(2020, 11, 3)},
+		{CultureDay, 2021, d(2021, 11, 3), d(2021, 11, 3)},
+		{CultureDay, 2022, d(2022, 11, 3), d(2022, 11, 3)},
+
+		{LaborThanksgivingDay, 2014, d(2014, 11, 23), d(2014, 11, 24)},
+		{LaborThanksgivingDay, 2015, d(2015, 11, 23), d(2015, 11, 23)},
+		{LaborThanksgivingDay, 2016, d(2016, 11, 23), d(2016, 11, 23)},
+		{LaborThanksgivingDay, 2017, d(2017, 11, 23), d(2017, 11, 23)},
+		{LaborThanksgivingDay, 2018, d(2018, 11, 23), d(2018, 11, 23)},
+		{LaborThanksgivingDay, 2019, d(2019, 11, 23), d(2019, 11, 23)},
+		{LaborThanksgivingDay, 2020, d(2020, 11, 23), d(2020, 11, 23)},
+		{LaborThanksgivingDay, 2021, d(2021, 11, 23), d(2021, 11, 23)},
+		{LaborThanksgivingDay, 2022, d(2022, 11, 23), d(2022, 11, 23)},
+
+		{NationalHolidayBetweenRespectForTheAgedDayAndAutumnalEquinoxDay, 2009, d(2009, 9, 22), d(2009, 9, 22)},
+		{NationalHolidayBetweenRespectForTheAgedDayAndAutumnalEquinoxDay, 2015, d(2015, 9, 22), d(2015, 9, 22)},
+		{NationalHolidayBetweenRespectForTheAgedDayAndAutumnalEquinoxDay, 2026, d(2026, 9, 22), d(2026, 9, 22)},
+		{NationalHolidayBetweenRespectForTheAgedDayAndAutumnalEquinoxDay, 2022, time.Time{}, time.Time{}},
+		{NationalHolidayBetweenRespectForTheAgedDayAndAutumnalEquinoxDay, 2032, d(2032, 9, 21), d(2032, 9, 21)},
+
+		{NationalHolidayBetweenShowaDayAndNewEmperorEnthronementDay, 2019, d(2019, 4, 30), d(2019, 4, 30)},
+
+		{TheNewEmperorEnthronementDay, 2019, d(2019, 5, 1), d(2019, 5, 1)},
+
+		{NationalHolidayBetweenTheNewEmperorEnthronementDayAndConstitutionMemorialDay, 2019, d(2019, 5, 2), d(2019, 5, 2)},
+
+		{TheNewEmperorEnthronementCeremony, 2019, d(2019, 10, 22), d(2019, 10, 22)},
+	}
+
+	for _, test := range tests {
+		gotAct, gotObs := test.h.Calc(test.y)
+		if !gotAct.Equal(test.wantAct) {
+			t.Errorf("%s %d: got actual: %s, want: %s", test.h.Name, test.y, gotAct.String(), test.wantAct.String())
+		}
+		if !gotObs.Equal(test.wantObs) {
+			t.Errorf("%s %d: got observed: %s, want: %s", test.h.Name, test.y, gotObs.String(), test.wantObs.String())
+		}
+	}
+}