diff --git a/src/main/scala/Gigasecond.scala b/src/main/scala/Gigasecond.scala
index 5edba80..2e908a4 100644
--- a/src/main/scala/Gigasecond.scala
+++ b/src/main/scala/Gigasecond.scala
@@ -1,6 +1,14 @@
+import java.time.LocalDate
+import java.time.LocalDateTime
 object Gigasecond {
-  def add(startDate: LocalDate): LocalDateTime = ???
+  def add(startDate: LocalDate): LocalDateTime = {
+    val gigasecondMoment = startDate.atStartOfDay().plusSeconds(1000000000)
+    gigasecondMoment
+  }
 
-  def add(startDateTime: LocalDateTime): LocalDateTime = ???
+  def add(startDateTime: LocalDateTime): LocalDateTime = {
+    val gigasecondMoment = startDateTime.plusSeconds(1000000000)
+    gigasecondMoment
+  }
 }