diff --git a/src/main/java/eu/m724/wtapi/object/Twilight.java b/src/main/java/eu/m724/wtapi/object/Twilight.java
index 26b5846..ebc4e76 100644
--- a/src/main/java/eu/m724/wtapi/object/Twilight.java
+++ b/src/main/java/eu/m724/wtapi/object/Twilight.java
@@ -3,25 +3,13 @@ package eu.m724.wtapi.object;
 import java.time.Duration;
 import java.time.LocalDate;
 
-public class Twilight {
-    /**
-     * The date this object contains times for
-     */
-    public final LocalDate date;
-
-    /**
-     * Time of sunrise relative to UTC midnight of the date
-     */
-    public final Duration sunrise;
-
-    /**
-     * Time of sunset relative to UTC midnight of the date
-     */
-    public final Duration sunset;
-
-    public Twilight(LocalDate date, Duration sunrise, Duration sunset) {
-        this.date = date;
-        this.sunrise = sunrise;
-        this.sunset = sunset;
+/**
+ * @param date    The date this object contains times for
+ * @param sunrise Time of sunrise relative to UTC midnight of the date
+ * @param sunset  Time of sunset relative to UTC midnight of the date
+ */
+public record Twilight(LocalDate date, Duration sunrise, Duration sunset) {
+    public Duration getDayLength() {
+        return sunset.minus(sunrise);
     }
 }
diff --git a/src/test/java/eu/m724/wtapi/twilight/ApproximateTwilightTimeTest.java b/src/test/java/eu/m724/wtapi/twilight/ApproximateTwilightTimeTest.java
index 0f03a05..b8aeedd 100644
--- a/src/test/java/eu/m724/wtapi/twilight/ApproximateTwilightTimeTest.java
+++ b/src/test/java/eu/m724/wtapi/twilight/ApproximateTwilightTimeTest.java
@@ -37,12 +37,12 @@ public class ApproximateTwilightTimeTest {
         System.out.println(date);
         System.out.println(coordinates.latitude + " " + coordinates.longitude);
 
-        System.out.println("Calculated sunrise: " + date.atStartOfDay().plus(twilight.sunrise));
+        System.out.println("Calculated sunrise: " + date.atStartOfDay().plus(twilight.sunrise()));
         System.out.println("Actual sunrise: " + date.atStartOfDay().plusMinutes(actualSunrise));
-        assert Math.abs(twilight.sunrise.toMinutes() - actualSunrise) < ACCEPTABLE_DIFFERENCE;
+        assert Math.abs(twilight.sunrise().toMinutes() - actualSunrise) < ACCEPTABLE_DIFFERENCE;
 
-        System.out.println("Calculated sunset: " + date.atStartOfDay().plus(twilight.sunset));
+        System.out.println("Calculated sunset: " + date.atStartOfDay().plus(twilight.sunset()));
         System.out.println("Actual sunset: " + date.atStartOfDay().plusMinutes(actualSunset));
-        assert Math.abs(twilight.sunset.toMinutes() - actualSunset) < ACCEPTABLE_DIFFERENCE;
+        assert Math.abs(twilight.sunset().toMinutes() - actualSunset) < ACCEPTABLE_DIFFERENCE;
     }
 }
diff --git a/src/test/java/eu/m724/wtapi/twilight/MockTwilightTimeTest.java b/src/test/java/eu/m724/wtapi/twilight/MockTwilightTimeTest.java
index 0b55511..48e3433 100644
--- a/src/test/java/eu/m724/wtapi/twilight/MockTwilightTimeTest.java
+++ b/src/test/java/eu/m724/wtapi/twilight/MockTwilightTimeTest.java
@@ -16,8 +16,8 @@ public class MockTwilightTimeTest {
         Coordinates coordinates = new Coordinates(52.4796012, 62.1847245);
         Twilight twilight = provider.calculateTwilightTime(date, coordinates);
 
-        assert twilight.date.equals(date);
-        assert twilight.sunrise.getSeconds() == -6840;
-        assert twilight.sunset.getSeconds() == 6840;
+        assert twilight.date().equals(date);
+        assert twilight.sunrise().getSeconds() == -6840;
+        assert twilight.sunset().getSeconds() == 6840;
     }
 }