diff --git a/README.md b/README.md
index f212254..e3e67d9 100644
--- a/README.md
+++ b/README.md
@@ -118,6 +118,7 @@ const (
     LocaleFrGF = "fr_RE" // French (Reunion)
     LocaleCsCZ = "cs_CZ" // Czech (Czech Republic)
     LocaleSlSI = "sl_SI" // Slovenian (Slovenia)
+    LocaleLtLT = "lt_LT" // Lithuanian (Lithuania)
 )
 ```
 
diff --git a/default_formats.go b/default_formats.go
index 65c8747..0ab894d 100644
--- a/default_formats.go
+++ b/default_formats.go
@@ -214,6 +214,12 @@ const (
 	DefaultFormatCsCZMedium   = "02 Jan 2006"
 	DefaultFormatCsCZShort    = "02/01/2006"
 	DefaultFormatCsCZDateTime = "02/01/2006 15:04"
+
+	DefaultFormatLtLTFull     = "2006 m. January 2 d., Monday" // Lithuanian (Lithuania)
+	DefaultFormatLtLTLong     = "2006 January 2 d."
+	DefaultFormatLtLTMedium   = "2006 Jan 2"
+	DefaultFormatLtLTShort    = "2006-01-02"
+	DefaultFormatLtLTDateTime = "2006-01-02, 15:04"
 )
 
 // FullFormatsByLocale maps locales to the'full' date formats for all
@@ -254,6 +260,7 @@ var FullFormatsByLocale = map[Locale]string{
 	LocaleElGR: DefaultFormatElGRFull,
 	LocaleCsCZ: DefaultFormatCsCZFull,
 	LocaleUkUA: DefaultFormatUkUAFull,	
+	LocaleLtLT: DefaultFormatLtLTFull,
 }
 
 // LongFormatsByLocale maps locales to the 'long' date formats for all
@@ -294,6 +301,7 @@ var LongFormatsByLocale = map[Locale]string{
 	LocaleElGR: DefaultFormatElGRLong,
 	LocaleCsCZ: DefaultFormatCsCZLong,
 	LocaleUkUA: DefaultFormatUkUALong,
+	LocaleLtLT: DefaultFormatLtLTLong,
 }
 
 // MediumFormatsByLocale maps locales to the 'medium' date formats for all
@@ -334,6 +342,7 @@ var MediumFormatsByLocale = map[Locale]string{
 	LocaleElGR: DefaultFormatElGRMedium,
 	LocaleCsCZ: DefaultFormatCsCZMedium,
 	LocaleUkUA: DefaultFormatUkUAMedium,
+	LocaleLtLT: DefaultFormatLtLTMedium,
 }
 
 // ShortFormatsByLocale maps locales to the 'short' date formats for all
@@ -374,6 +383,7 @@ var ShortFormatsByLocale = map[Locale]string{
 	LocaleElGR: DefaultFormatElGRShort,
 	LocaleCsCZ: DefaultFormatCsCZShort,
 	LocaleUkUA: DefaultFormatUkUAShort,
+	LocaleLtLT: DefaultFormatLtLTShort,
 }
 
 // DateTimeFormatsByLocale maps locales to the 'DateTime' date formats for
@@ -414,4 +424,5 @@ var DateTimeFormatsByLocale = map[Locale]string{
 	LocaleElGR: DefaultFormatElGRDateTime,
 	LocaleCsCZ: DefaultFormatCsCZDateTime,
 	LocaleUkUA: DefaultFormatUkUADateTime,
+	LocaleLtLT: DefaultFormatLtLTDateTime,
 }
diff --git a/format_lt_lt.go b/format_lt_lt.go
new file mode 100644
index 0000000..264a67a
--- /dev/null
+++ b/format_lt_lt.go
@@ -0,0 +1,85 @@
+package monday
+
+// ============================================================
+// Format rules for "lt_LT" locale: Lithuanian (Lithuania)
+// ============================================================
+
+var longDayNamesLtLT = map[string]string{
+	"Sunday":    "sekmadienis",
+	"Monday":    "pirmadienis",
+	"Tuesday":   "antradienis",
+	"Wednesday": "trečiadienis",
+	"Thursday":  "ketvirtadienis",
+	"Friday":    "penktadienis",
+	"Saturday":  "šeštadienis",
+}
+
+var shortDayNamesLtLT = map[string]string{
+	"Sun": "VII",
+	"Mon": "I",
+	"Tue": "II",
+	"Wed": "III",
+	"Thu": "IV",
+	"Fri": "V",
+	"Sat": "VI",
+}
+
+var longMonthNamesLtLT = map[string]string{
+	"January":   "sausis",
+	"February":  "vasaris",
+	"March":     "kovas",
+	"April":     "balandis",
+	"May":       "gegužė",
+	"June":      "birželis",
+	"July":      "liepa",
+	"August":    "rugpjūtis",
+	"September": "rugsėjis",
+	"October":   "spalis",
+	"November":  "lapkritis",
+	"December":  "gruodis",
+}
+
+var longMonthNamesGenitiveLtLT = map[string]string{
+	"January":   "sausio",
+	"February":  "vasario",
+	"March":     "kovo",
+	"April":     "balandžio",
+	"May":       "gegužės",
+	"June":      "birželio",
+	"July":      "liepos",
+	"August":    "rugpjūčio",
+	"September": "rugsėjio",
+	"October":   "spalio",
+	"November":  "lapkričio",
+	"December":  "gruodžio",
+}
+
+var shortMonthNamesLtLT = map[string]string{
+	"Jan": "sausis",
+	"Feb": "vas",
+	"Mar": "kovas",
+	"Apr": "bal",
+	"May": "geg",
+	"Jun": "birž",
+	"Jul": "liepa",
+	"Aug": "rugpj",
+	"Sep": "rugs",
+	"Oct": "spalis",
+	"Nov": "lapkr",
+	"Dec": "gruodis",
+}
+
+var shortMonthNamesGenitiveLtLT = map[string]string{
+	"Jan": "sausio",
+	"Feb": "vas",
+	"Mar": "kovo",
+	"Apr": "bal",
+	"May": "geg",
+	"Jun": "birž",
+	"Jul": "liepos",
+	"Aug": "rugpj",
+	"Sep": "rugs",
+	"Oct": "spalio",
+	"Nov": "lapkr",
+	"Dec": "gruodžio",
+}
diff --git a/locale.go b/locale.go
index 6be569e..518bacb 100644
--- a/locale.go
+++ b/locale.go
@@ -45,6 +45,7 @@ const (
 	LocaleFrGF = "fr_GF" // French (French Guiana)
 	LocaleCsCZ = "cs_CZ" // Czech (Czech Republic)
 	LocaleSlSI = "sl_SI" // Slovenian (Slovenia)
+	LocaleLtLT = "lt_LT" // Lithuanian (Lithuania)
 )
 
 // ListLocales returns all locales supported by the package.
@@ -87,5 +88,6 @@ func ListLocales() []Locale {
 		LocaleFrGF,
 		LocaleCsCZ,
 		LocaleSlSI,
+		LocaleLtLT,
 	}
 }
diff --git a/monday.go b/monday.go
index cbcaf27..5e4a034 100644
--- a/monday.go
+++ b/monday.go
@@ -47,6 +47,7 @@ var internalFormatFuncs = map[Locale]internalFormatFunc{
 	LocaleIdID: createCommonFormatFunc(LocaleIdID),
 	LocaleCsCZ: createCommonFormatFunc(LocaleCsCZ),
 	LocaleSlSI: createCommonFormatFunc(LocaleSlSI),
+	LocaleLtLT: createCommonFormatFuncWithGenitive(LocaleLtLT),
 }
 
 // internalParseFunc is a preprocessor for default time.ParseInLocation func
@@ -91,6 +92,7 @@ var internalParseFuncs = map[Locale]internalParseFunc{
 	LocaleIdID: createCommonParseFunc(LocaleIdID),
 	LocaleCsCZ: createCommonParseFunc(LocaleCsCZ),
 	LocaleSlSI: createCommonParseFunc(LocaleSlSI),
+	LocaleLtLT: createCommonParsetFuncWithGenitive(LocaleLtLT),
 }
 
 var knownDaysShort = map[Locale]map[string]string{}           // Mapping for 'Format', days of week, short form
@@ -355,6 +357,14 @@ func fillKnownWords() {
 	fillKnownDaysShort(shortDayNamesSlSI, LocaleSlSI)
 	fillKnownMonthsLong(longMonthNamesSlSI, LocaleSlSI)
 	fillKnownMonthsShort(shortMonthNamesSlSI, LocaleSlSI)
+
+	// Lt_LT: Lithuanian (Lithuania)
+	fillKnownDaysLong(longDayNamesLtLT, LocaleLtLT)
+	fillKnownDaysShort(shortDayNamesLtLT, LocaleLtLT)
+	fillKnownMonthsLong(longMonthNamesLtLT, LocaleLtLT)
+	fillKnownMonthsShort(shortMonthNamesLtLT, LocaleLtLT)
+	fillKnownMonthsGenitiveLong(longMonthNamesGenitiveLtLT, LocaleLtLT)
+	fillKnownMonthsGenitiveShort(shortMonthNamesGenitiveLtLT, LocaleLtLT)
 }
 
 func fill(src map[string]string, dest map[Locale]map[string]string, locale Locale) {