BAEL-896 Working with dates in Kotlin

- Added code for working with dates tutorial

kotlin-libraries/src/main/kotlin/com/baeldung/kotlin/dates/CreateDate.kt

@@ -0,0 +1,31 @@
+package com.baeldung.kotlin.dates
+
+import java.time.LocalDate
+import java.time.format.DateTimeFormatter
+
+fun createDateUsingParseMethodDefaultFormat() {
+
+    var date = LocalDate.parse("2018-12-31")
+    println(date)
+}
+
+fun createDateUsingParseMethodCustomFormat() {
+
+    var formatter = DateTimeFormatter.ofPattern("dd-MM-yyyy")
+
+    var date = LocalDate.parse("31-12-2018", formatter)
+
+    println(date)
+}
+
+fun createDateUsingOfMethod() {
+    var date = LocalDate.of(2018, 12, 31)
+    println(date)
+
+}
+
+fun main(args: Array<String>) {
+
+    createDateUsingParseMethodCustomFormat()
+    createDateUsingOfMethod()
+}

kotlin-libraries/src/main/kotlin/com/baeldung/kotlin/dates/ExtractDate.kt

@@ -0,0 +1,24 @@
+package com.baeldung.kotlin.dates
+
+import java.time.LocalDate
+
+fun extractingCommonComponents() {
+    var date = LocalDate.parse("2018-12-31")
+
+    println(date.year)
+    println(date.month)
+    println(date.dayOfMonth)
+}
+
+fun extractingEraDowDoy() {
+    var date = LocalDate.parse("2018-12-31")
+
+    println(date.era)
+    println(date.dayOfWeek)
+    println(date.dayOfYear)
+}
+
+fun main(args: Array<String>) {
+    extractingCommonComponents()
+    extractingEraDowDoy()
+}

kotlin-libraries/src/main/kotlin/com/baeldung/kotlin/dates/PeriodDate.kt

@@ -0,0 +1,44 @@
+package com.baeldung.kotlin.dates
+
+import java.time.LocalDate
+import java.time.Period
+
+fun createAPeriod() {
+    var period = Period.of(1, 2, 3)
+
+    println(period)
+}
+
+fun addAPeriod() {
+    var period = Period.of(1, 2, 3)
+
+    var date = LocalDate.of(2018, 6, 25)
+    var modifiedDate = date.plus(period)
+
+    println(modifiedDate)
+}
+
+fun subtractAPeriod() {
+    var period = Period.of(1, 2, 3)
+
+    var date = LocalDate.of(2018, 6, 25)
+    var modifiedDate = date.minus(period)
+
+    println(modifiedDate)
+}
+
+fun getAPeriod() {
+
+    var date1 = LocalDate.parse("2018-06-25")
+    var date2 = LocalDate.parse("2018-12-25")
+
+    var period = Period.between(date1, date2)
+    println(period)
+}
+
+fun main(args: Array<String>) {
+    createAPeriod()
+    addAPeriod()
+    subtractAPeriod()
+    getAPeriod()
+}

kotlin-libraries/src/main/kotlin/com/baeldung/kotlin/dates/PrintDate.kt

@@ -0,0 +1,26 @@
+package com.baeldung.kotlin.dates
+
+import java.time.LocalDate
+import java.time.format.DateTimeFormatter
+
+fun printDateDefaultFormat() {
+
+    var date = LocalDate.parse("2018-12-31")
+    println(date)
+}
+
+fun printDateUsingCustomFormat() {
+
+    var date = LocalDate.parse("2018-12-31")
+
+    var formatter = DateTimeFormatter.ofPattern("dd-MMMM-yyyy")
+    var formattedDate = date.format(formatter)
+    println(formattedDate)
+}
+
+fun main(args: Array<String>) {
+
+    printDateDefaultFormat()
+
+    printDateUsingCustomFormat()
+}