diff --git a/Applications/Calendar.app/Icon.pic b/Applications/Calendar.app/Icon.pic
new file mode 100644
index 00000000..020a44ae
Binary files /dev/null and b/Applications/Calendar.app/Icon.pic differ
diff --git a/Applications/Calendar.app/Icons/ArrowLeft.pic b/Applications/Calendar.app/Icons/ArrowLeft.pic
new file mode 100644
index 00000000..68fc39ea
Binary files /dev/null and b/Applications/Calendar.app/Icons/ArrowLeft.pic differ
diff --git a/Applications/Calendar.app/Icons/ArrowLeftBlack.pic b/Applications/Calendar.app/Icons/ArrowLeftBlack.pic
new file mode 100644
index 00000000..965a36ca
Binary files /dev/null and b/Applications/Calendar.app/Icons/ArrowLeftBlack.pic differ
diff --git a/Applications/Calendar.app/Icons/ArrowRight.pic b/Applications/Calendar.app/Icons/ArrowRight.pic
new file mode 100644
index 00000000..71673044
Binary files /dev/null and b/Applications/Calendar.app/Icons/ArrowRight.pic differ
diff --git a/Applications/Calendar.app/Icons/ArrowRightBlack.pic b/Applications/Calendar.app/Icons/ArrowRightBlack.pic
new file mode 100644
index 00000000..c1459dcb
Binary files /dev/null and b/Applications/Calendar.app/Icons/ArrowRightBlack.pic differ
diff --git a/Applications/Calendar.app/Localizations/English.lang b/Applications/Calendar.app/Localizations/English.lang
new file mode 100644
index 00000000..3f89aab8
--- /dev/null
+++ b/Applications/Calendar.app/Localizations/English.lang
@@ -0,0 +1,21 @@
+{
+	weekLine = "Mo  Tu  We  Th  Fr  Sa  Su",
+	weekLineAlt = "Su  Mo  Tu  We  Th  Fr  Sa",
+	months = {
+		"January",
+		"February",
+		"March",
+		"April",
+		"May",
+		"June",
+		"July",
+		"August",
+		"September",
+		"October",
+		"November",
+		"December",
+	},
+	startWeek = "Start week from ",
+	monday = "Monday",
+	sunday = "Sunday"
+}
diff --git a/Applications/Calendar.app/Localizations/Russian.lang b/Applications/Calendar.app/Localizations/Russian.lang
new file mode 100644
index 00000000..5c9fa81e
--- /dev/null
+++ b/Applications/Calendar.app/Localizations/Russian.lang
@@ -0,0 +1,21 @@
+{
+	weekLine = "Пн  Вт  Ср  Чт  Пт  Сб  Вс",
+	weekLineAlt = "Вс  Пн  Вт  Ср  Чт  Пт  Сб",
+	months = {
+		"Январь",
+		"Февраль",
+		"Март",
+		"Апрель",
+		"Май",
+		"Июнь",
+		"Июль",
+		"Август",
+		"Сентябрь",
+		"Октябрь",
+		"Ноябрь",
+		"Декабрь",
+	},
+	startWeek = "Начинать неделю с ",
+	monday = "Понедельника",
+	sunday = "Воскресенья"
+}
diff --git a/Applications/Calendar.app/Main.lua b/Applications/Calendar.app/Main.lua
new file mode 100644
index 00000000..e7454eca
--- /dev/null
+++ b/Applications/Calendar.app/Main.lua
@@ -0,0 +1,217 @@
+local GUI = require("GUI")
+local system = require("System")
+local bigLetters = require("BigLetters")
+local screen = require("Screen")
+local image = require("Image")
+local fs = require("Filesystem")
+
+
+local workspace, window, menu = system.addWindow(GUI.filledWindow(1, 1, 42, 24, 0xFFFFFF))
+window.actionButtons.localY = 1
+
+local localization = system.getCurrentScriptLocalization()
+local iconsPath = fs.path(system.getCurrentScript()) .. "Icons/"
+local isWeekAlt = false
+
+local countOfDays = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
+local monthDateMove = {3, 2, 3, 2, 3, 2, 3, 3, 2, 3, 2, 3}
+local lastCountedYear = 0
+local comMonthMem
+local curYearList
+
+local function isLeap(year)
+	if year % 4 == 0 or year % 400 == 0 then return true else return false end
+end
+
+local function getNextDay(day)
+	return day < 7 and day + 1 or 1
+end
+
+local function calculateYear(year, fstDayPos)
+	local yearList = {}
+	local leap = isLeap(year)
+
+	for month = 1, 12 do
+   		yearList[month] = {}
+
+    		if month == 2 then
+      			if leap then
+				yearList[month].countOfDays = 29
+				yearList[month].fstDayPos = fstDayPos
+				fstDayPos = getNextDay(fstDayPos)
+			else
+				yearList[month].countOfDays = 28
+				yearList[month].fstDayPos = fstDayPos
+      			end
+   		 else
+			yearList[month].countOfDays = countOfDays[month]
+			yearList[month].fstDayPos = fstDayPos
+			for i = 1, monthDateMove[month] do
+				fstDayPos = getNextDay(fstDayPos)
+      			end
+		end
+	end
+
+	return yearList
+end
+
+local function fstJanPos(year)
+	local day = 0
+
+	local difference = math.abs(year - 1010)
+	local leapCount
+  
+	if difference % 4 == 0 then
+		leapCount = difference / 4
+	elseif difference % 4 == 1 or difference % 4 == 2 then
+		leapCount = math.floor(difference / 4)
+	elseif difference % 4 == 3 then
+		leapCount = math.floor(difference / 4) + 1
+	end
+
+	local offset = difference + leapCount
+
+	if offset % 7 == 0 then
+		day = 1
+	else
+		day = offset % 7 + 1
+	end
+
+	return day
+end
+
+local function makeIconButton(x, y, parentObj, icon, onTouch)
+	local obj = GUI.image(x, y, image.load(iconsPath .. icon .. ".pic"))
+	parentObj:addChild(obj).eventHandler = function(_, _, event)
+		if event == "touch" then
+			onTouch()
+		end
+	end
+	return obj
+end
+
+local currentStamp = os.date("*t", system.getTime())
+local currentYear, currentMonth, currentDay = currentStamp.year, currentStamp.month, currentStamp.day
+local selectedYear, selectedMonth = currentYear, currentMonth
+
+local function renderYear(object)
+	local text = tostring(selectedYear)
+	local width = bigLetters.getTextSize(text)
+	bigLetters.drawText(math.floor(object.x + object.width / 2 - width / 2), object.y, 0x000000, text)
+end
+
+local year = window:addChild(GUI.object(8, 3, 28, 5))
+year.draw = function(object)
+	renderYear(object)
+end
+
+
+local function renderMonth(xCoord, yCoord, width, monthPos)
+	local text = localization.months[monthPos]
+	local weekText = isWeekAlt and localization.weekLineAlt or localization.weekLine
+	local xStart = math.floor(xCoord + width / 2 - unicode.len(weekText) / 2)
+	screen.drawText(math.floor(xCoord + width / 2 - unicode.len(text) / 2), yCoord, 0xFF0000, text)
+	screen.drawText(xStart, yCoord + 2, 0x888888, weekText)
+	if not curYearList or selectedYear ~= lastCountedYear then
+		curYearList = calculateYear(selectedYear, fstJanPos(selectedYear))
+	end
+	
+	local counter, line = curYearList[monthPos].fstDayPos - 1, 4
+	if isWeekAlt then
+		counter = counter + 1 == 7 and 0 or counter + 1
+	end
+	for i=1, curYearList[monthPos].countOfDays do
+		local numColor = (isWeekAlt and (counter == 0 or counter == 6) and 0xFF0000) or (not isWeekAlt and counter > 4 and 0xFF0000) or 0x262626 
+		if selectedYear == currentYear and monthPos == currentMonth and i == currentDay then
+			screen.drawText(xStart + (counter * 4) - 1, yCoord + line - 1, 0xC3C3C3, '⢀▄▄⡀')
+			screen.drawRectangle(xStart + (counter * 4) - 1, yCoord + line, 4, 1, 0xC3C3C3, 0x000000, ' ')
+			screen.drawText(xStart + (counter * 4) - 1, yCoord + line + 1, 0xC3C3C3, '⠈▀▀⠁')
+		end
+		screen.drawText(xStart + (counter * 4), yCoord + line, numColor, (i < 10 and ' ' or '')..tostring(i))
+		counter = counter == 6 and 0 or counter + 1
+		if counter == 0 then line = line + 2 end
+	end
+end
+
+local month = window:addChild(GUI.object(9, 9, 26, 15))
+month.draw = function(object)
+	renderMonth(object.x, object.y, object.width, selectedMonth)
+end
+
+
+local function prevYear()
+	selectedYear = selectedYear == 0 and selectedYear or selectedYear - 1
+	workspace:draw()
+end
+
+local function nextYear()
+	selectedYear = selectedYear == 9999 and selectedYear or selectedYear + 1
+	workspace:draw()
+end
+
+local arrowLeftBlack = makeIconButton(3, 4, window, "ArrowLeftBlack", prevYear)
+
+local arrowRightBlack = makeIconButton(39, 4, window, "ArrowRightBlack", nextYear)
+
+
+local function prevMonth()
+	selectedMonth = selectedMonth - 1
+	if selectedMonth < 1 then if selectedYear - 1 ~= -1 then selectedMonth = 12 prevYear() else selectedMonth = 1 end
+	else workspace:draw() end
+end
+
+local function nextMonth()
+	selectedMonth = selectedMonth + 1
+	if selectedMonth > 12 then if selectedYear + 1 ~= 10000 then selectedMonth = 1 nextYear() else selectedMonth = 12 end
+	else workspace:draw() end
+end
+
+
+local arrowLeft = makeIconButton(3, 15, window, "ArrowLeft", prevMonth)
+
+local arrowRight = makeIconButton(39, 15, window, "ArrowRight", nextMonth)
+
+
+local weekType = menu:addItem(localization.startWeek..localization.sunday)
+weekType.onTouch = function()
+	isWeekAlt = not isWeekAlt
+	weekType.text = isWeekAlt and localization.startWeek..localization.monday or localization.startWeek..localization.sunday
+end
+
+
+window.actionButtons.maximize.onTouch = function()
+	if not window.maximized then
+		year.localX, year.localY = 130, 3
+		arrowLeftBlack.localX, arrowLeftBlack.localY = 129, 9
+		arrowRightBlack.localX, arrowRightBlack.localY = 157, 9
+		month.localX, month.localY = 3, 2
+		comMonthMem = selectedMonth
+		selectedMonth = 1
+		local mx, my = 35, 2
+		for i=2, 12 do
+			local newMonth = window:addChild(GUI.object(mx, my, 26, 15))
+			newMonth.draw = function(object)
+				renderMonth(object.x, object.y, object.width, i)
+			end
+			mx = mx + 32 == 131 and 3 or mx + 32
+			if mx == 3 then my = my + 16 end
+		end
+	else
+		year.localX, year.localY = 8, 3
+		arrowLeftBlack.localX, arrowLeftBlack.localY = 3, 4
+		arrowRightBlack.localX, arrowRightBlack.localY = 39, 4
+		month.localX, month.localY = 9, 9
+		selectedMonth = comMonthMem
+		window:removeChildren(9)
+	end
+	window:maximize()
+	arrowLeft.hidden = not arrowLeft.hidden
+	arrowRight.hidden = not arrowRight.hidden
+end
+
+
+window.onResize = function(newWidth, newHeight)
+	window.backgroundPanel.width, window.backgroundPanel.height = newWidth, newHeight
+end
+
+workspace:draw()
diff --git a/Installer/Files.cfg b/Installer/Files.cfg
index c5c5ded6..b4380ac0 100644
--- a/Installer/Files.cfg
+++ b/Installer/Files.cfg
@@ -182,6 +182,15 @@
 		"Applications/Settings.app/Localizations/Italian.lang",
 		"Applications/Settings.app/Localizations/Japanese.lang",
 		"Applications/Settings.app/Localizations/Dutch.lang",
+		-- Calendar
+		{ path="Applications/Calendar.app/Main.lua", shortcut = true },
+		"Applications/Calendar.app/Icon.pic",
+		"Applications/Calendar.app/Icons/ArrowLeft.pic",
+		"Applications/Calendar.app/Icons/ArrowRight.pic",
+		"Applications/Calendar.app/Icons/ArrowLeftBlack.pic",
+		"Applications/Calendar.app/Icons/ArrowRightBlack.pic",
+		"Applications/Calendar.app/Localizations/English.lang",
+		"Applications/Calendar.app/Localizations/Russian.lang",
 		-- 3D Print
 		{ path="Applications/3D Print.app/Main.lua", id=859, shortcut = true },
 		"Applications/3D Print.app/Icon.pic",