#BAEL-16646 Start splitting Java dates articles regarding Java 8.

core-java-modules/core-java-datetime/java-dates-java8/README.md

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+## Java 8+ Date and Time API 
+
+This module contains articles about the Date and Time API introduced with Java 8.
+
+### Relevant Articles: 
+- [Migrating to the New Java 8 Date Time API](http://www.baeldung.com/migrating-to-java-8-date-time-api)

core-java-modules/core-java-datetime/java-dates-java8/pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>java-dates-java8</artifactId>
+    <version>${project.parent.version}</version>
+    <name>java-dates-java8</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../../parent-java</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>java-dates-java8</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven-compiler-plugin.version}</version>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+		<maven.compiler.source>1.9</maven.compiler.source>
+        <maven.compiler.target>1.9</maven.compiler.target>
+        <!-- testing -->
+        <assertj.version>3.6.1</assertj.version>
+    </properties>
+</project>

core-java-modules/core-java-datetime/java-dates-java8/src/test/java/com/baeldung/dateapi/ConversionExample.java

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+package com.baeldung.dateapi;
+
+import java.time.Instant;
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+
+public class ConversionExample {
+    public static void main(String[] args) {
+        Instant instantFromCalendar = GregorianCalendar.getInstance().toInstant();
+        ZonedDateTime zonedDateTimeFromCalendar = new GregorianCalendar().toZonedDateTime();
+        Date dateFromInstant = Date.from(Instant.now());
+        GregorianCalendar calendarFromZonedDateTime = GregorianCalendar.from(ZonedDateTime.now());
+        Instant instantFromDate = new Date().toInstant();
+        ZoneId zoneIdFromTimeZone = TimeZone.getTimeZone("PST").toZoneId();
+    }
+}

core-java-modules/core-java-datetime/java-dates-java8/src/test/java/com/baeldung/dateapi/JavaUtilTimeUnitTest.java

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+package com.baeldung.dateapi;
+
+import org.junit.Test;
+
+import java.text.ParseException;
+import java.time.Duration;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
+import java.time.Month;
+import java.time.YearMonth;
+import java.time.format.DateTimeFormatter;
+import java.time.temporal.ChronoUnit;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class JavaUtilTimeUnitTest {
+
+    @Test
+    public void currentTime() {
+        final LocalDate now = LocalDate.now();
+
+        System.out.println(now);
+        // there is not much to test here
+    }
+
+    @Test
+    public void specificTime() {
+        LocalDate birthDay = LocalDate.of(1990, Month.DECEMBER, 15);
+
+        System.out.println(birthDay);
+        // there is not much to test here
+    }
+
+    @Test
+    public void extractMonth() {
+        Month month = LocalDate.of(1990, Month.DECEMBER, 15).getMonth();
+
+        assertThat(month).isEqualTo(Month.DECEMBER);
+    }
+
+    @Test
+    public void subtractTime() {
+        LocalDateTime fiveHoursBefore = LocalDateTime.of(1990, Month.DECEMBER, 15, 15, 0).minusHours(5);
+
+        assertThat(fiveHoursBefore.getHour()).isEqualTo(10);
+    }
+
+    @Test
+    public void alterField() {
+        LocalDateTime inJune = LocalDateTime.of(1990, Month.DECEMBER, 15, 15, 0).with(Month.JUNE);
+
+        assertThat(inJune.getMonth()).isEqualTo(Month.JUNE);
+    }
+
+    @Test
+    public void truncate() {
+        LocalTime truncated = LocalTime.of(15, 12, 34).truncatedTo(ChronoUnit.HOURS);
+
+        assertThat(truncated).isEqualTo(LocalTime.of(15, 0, 0));
+    }
+
+    @Test
+    public void getTimeSpan() {
+        LocalDateTime now = LocalDateTime.now();
+        LocalDateTime hourLater = now.plusHours(1);
+        Duration span = Duration.between(now, hourLater);
+
+        assertThat(span).isEqualTo(Duration.ofHours(1));
+    }
+
+    @Test
+    public void formatAndParse() throws ParseException {
+        LocalDate someDate = LocalDate.of(2016, 12, 7);
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
+        String formattedDate = someDate.format(formatter);
+        LocalDate parsedDate = LocalDate.parse(formattedDate, formatter);
+
+        assertThat(formattedDate).isEqualTo("2016-12-07");
+        assertThat(parsedDate).isEqualTo(someDate);
+    }
+
+    @Test
+    public void daysInMonth() {
+        int daysInMonth = YearMonth.of(1990, 2).lengthOfMonth();
+
+        assertThat(daysInMonth).isEqualTo(28);
+    }
+}