diff --git a/README.md b/README.md
index 20167d1..e5f8231 100644
--- a/README.md
+++ b/README.md
@@ -13,9 +13,9 @@ chronos.New() // Base on current date
 chronos.New(time.Now()) // Time interface
 d := chronos.New("2019/10/30 01:30") // string interface
 l := d.Lunar() // Get lunar calendar
-fmt.Println(l.Date())
+fmt.Println(l.String())
 // print: "己亥年十月初三"
-fmt.Println(l.EightCharacter())
+fmt.Println(l.EightChar())
 // print: "己 亥 甲 戌 庚 子 丁 丑"
 d.Solar() // Get solar calendar
 ```
diff --git a/calendar.go b/calendar.go
index 0b9f9af..ca73065 100644
--- a/calendar.go
+++ b/calendar.go
@@ -16,7 +16,6 @@ type calendar struct {
 type Calendar interface {
 	Lunar() *Lunar
 	Solar() *Solar
-	LunarDate() string
 }
 
 type CalendarData interface {
@@ -57,7 +56,3 @@ func (c *calendar) Lunar() *Lunar {
 func (c *calendar) Solar() *Solar {
 	return &Solar{time: c.time}
 }
-
-func (c *calendar) LunarDate() string {
-	return c.Lunar().Date()
-}
diff --git a/lunar.go b/lunar.go
index 83c3f4a..3d8c11b 100644
--- a/lunar.go
+++ b/lunar.go
@@ -47,7 +47,7 @@ func (l *Lunar) Calendar() Calendar {
 	return New(t)
 }
 
-func (l *Lunar) EightCharacter() []string {
+func (l *Lunar) EightChar() []string {
 	rlt := l.YearString(l.lichunOffset) + l.MonthString() + l.DayString() + l.HourString()
 	return strings.Split(rlt, "")
 }
@@ -230,7 +230,7 @@ func daysBetween(d time.Time, s time.Time) int {
 	return int(subValue)
 }
 
-func Solar2Lunar(time time.Time) string {
+func LunarString(time time.Time) string {
 	lunar := CalculateLunar(time.Format(_dateFormat))
 	result := StemBranchYear(lunar.year) + "年"
 	if lunar.leap && (lunar.month == lunar.leapMonth) {
@@ -241,7 +241,7 @@ func Solar2Lunar(time time.Time) string {
 	return result
 }
 
-func (lunar *Lunar) Date() string {
+func (lunar *Lunar) String() string {
 	result := getChineseYear(lunar.year)
 	if lunar.isLeap() {
 		result += "閏"
diff --git a/lunar_test.go b/lunar_test.go
index 0922ddf..81adaee 100644
--- a/lunar_test.go
+++ b/lunar_test.go
@@ -32,31 +32,31 @@ func TestStemBranchHour(t *testing.T) {
 }
 
 func TestNewLunar(t *testing.T) {
-	assert.NotNil(t, chronos.New().Lunar().Date())
+	assert.NotNil(t, chronos.New().Lunar().String())
 }
 
 func TestCalculateLunar(t *testing.T) {
 	assert := assert.New(t)
 	// assert.Equal("庚子年四月十六日", )
-	assert.Equal(strings.Split("己 亥 甲 戌 壬 寅 庚 子", " "), chronos.New("2019/10/31 23:13").Lunar().EightCharacter())
-	assert.Equal(strings.Split("己 亥 甲 戌 壬 寅 庚 子", " "), chronos.New("2019/11/01 0:13").Lunar().EightCharacter())
-	assert.Equal(strings.Split("己 亥 甲 戌 壬 寅 辛 丑", " "), chronos.New("2019/11/01 1:13").Lunar().EightCharacter())
-	assert.Equal(strings.Split("己 亥 丁 醜 丁 丑 庚 子", " "), chronos.New("2020/02/03 23:13").Lunar().EightCharacter())
-	assert.Equal(strings.Split("庚 子 戊 寅 丁 丑 辛 丑", " "), chronos.New("2020/02/04 1:13").Lunar().EightCharacter())
-	assert.Equal(strings.Split("庚 子 戊 寅 丁 丑 己 酉", " "), chronos.New("2020/02/04 18:13").Lunar().EightCharacter())
-	assert.Equal("己亥年臘月三十", chronos.New("2020/01/24 0:40").LunarDate())
-	assert.Equal("庚子年正月初一", chronos.New("2020/01/25 0:40").LunarDate())
-	assert.Equal(strings.Split("戊 辰 乙 醜 丁 卯 己 酉", " "), chronos.New("1989/01/07 18:40").Lunar().EightCharacter())
-	assert.Equal("戊辰年十一月三十", chronos.New("1989/01/07 18:40").LunarDate())
-	assert.Equal("戊辰年十一月三十", chronos.New("1989/01/07 0:40").LunarDate())
-	assert.Equal("己亥年四月廿八", chronos.New("2019/06/01 0:40").LunarDate())
+	assert.Equal(strings.Split("己 亥 甲 戌 壬 寅 庚 子", " "), chronos.New("2019/10/31 23:13").Lunar().EightChar())
+	assert.Equal(strings.Split("己 亥 甲 戌 壬 寅 庚 子", " "), chronos.New("2019/11/01 0:13").Lunar().EightChar())
+	assert.Equal(strings.Split("己 亥 甲 戌 壬 寅 辛 丑", " "), chronos.New("2019/11/01 1:13").Lunar().EightChar())
+	assert.Equal(strings.Split("己 亥 丁 醜 丁 丑 庚 子", " "), chronos.New("2020/02/03 23:13").Lunar().EightChar())
+	assert.Equal(strings.Split("庚 子 戊 寅 丁 丑 辛 丑", " "), chronos.New("2020/02/04 1:13").Lunar().EightChar())
+	assert.Equal(strings.Split("庚 子 戊 寅 丁 丑 己 酉", " "), chronos.New("2020/02/04 18:13").Lunar().EightChar())
+	assert.Equal("己亥年臘月三十", chronos.New("2020/01/24 0:40").Lunar().String())
+	assert.Equal("庚子年正月初一", chronos.New("2020/01/25 0:40").Lunar().String())
+	assert.Equal(strings.Split("戊 辰 乙 醜 丁 卯 己 酉", " "), chronos.New("1989/01/07 18:40").Lunar().EightChar())
+	assert.Equal("戊辰年十一月三十", chronos.New("1989/01/07 18:40").Lunar().String())
+	assert.Equal("戊辰年十一月三十", chronos.New("1989/01/07 0:40").Lunar().String())
+	assert.Equal("己亥年四月廿八", chronos.New("2019/06/01 0:40").Lunar().String())
+	assert.Equal("己亥年十月初三", chronos.New("2019/10/30 23:00").Lunar().String())
 }
 
 func TestLunarEightCharacter(t *testing.T) {
 	assert := assert.New(t)
-	assert.Equal(strings.Split("己 亥 甲 戌 庚 子 丁 丑", " "), chronos.New("2019/10/30 01:30").Lunar().EightCharacter())
+	assert.Equal(strings.Split("己 亥 甲 戌 庚 子 丁 丑", " "), chronos.New("2019/10/30 01:30").Lunar().EightChar())
 	expected := strings.Split("己 亥 甲 戌 辛 丑 戊 子", " ")
-	assert.Equal(expected, chronos.New("2019/10/30 23:00").Lunar().EightCharacter())
-	assert.Equal(expected, chronos.New("2019/10/31 00:30").Lunar().EightCharacter())
-	assert.Equal("己亥年十月初三", chronos.New("2019/10/30 23:00").Lunar().Date())
+	assert.Equal(expected, chronos.New("2019/10/30 23:00").Lunar().EightChar())
+	assert.Equal(expected, chronos.New("2019/10/31 00:30").Lunar().EightChar())
 }