diff --git a/core-java-modules/core-java-datetime-string/src/test/java/com/baeldung/instant/StringToInstantConverterUnitTest.java b/core-java-modules/core-java-datetime-string/src/test/java/com/baeldung/instant/StringToInstantConverterUnitTest.java
new file mode 100644
index 0000000000..a3732bf7da
--- /dev/null
+++ b/core-java-modules/core-java-datetime-string/src/test/java/com/baeldung/instant/StringToInstantConverterUnitTest.java
@@ -0,0 +1,32 @@
+package com.baeldung.instant;
+
+import org.junit.Test;
+
+import java.time.Instant;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.Locale;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class StringToInstantConverterUnitTest {
+    String stringDate = "09:15:30 PM, Sun 10/09/2022";
+    String pattern = "hh:mm:ss a, EEE M/d/uuuu";
+
+    @Test public void givenStringTimeStamp_whenConvertingWithInstantUsingTimeZone_thenConvertToInstant() {
+        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(pattern, Locale.US);
+        LocalDateTime localDateTime = LocalDateTime.parse(stringDate, dateTimeFormatter);
+        ZoneId zoneId = ZoneId.of("America/Chicago");
+        ZonedDateTime zonedDateTime = localDateTime.atZone(zoneId);
+        Instant instant = zonedDateTime.toInstant();
+        assertThat(instant.toString()).isEqualTo("2022-10-10T02:15:30Z");
+    }
+
+    @Test public void givenStringTimeStamp_whenConvertingWithLocalDateTime_thenConvertToInstant() {
+        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(pattern, Locale.US);
+        LocalDateTime localDateTime = LocalDateTime.parse(stringDate, dateTimeFormatter);
+        assertThat(localDateTime.toString()).isEqualTo("2022-10-09T21:15:30");
+    }
+}
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