Add sun related API

paper-api/src/main/java/org/bukkit/World.java

@@ -1835,6 +1835,16 @@ public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient
      */
     public void setFullTime(long time);
 
+    // Paper start
+
+    /**
+     * Check if it is currently daytime in this world
+     *
+     * @return True if it is daytime
+     */
+    public boolean isDayTime();
+    // Paper end
+
     /**
      * Gets the full in-game time on this world since the world generation
      *

paper-api/src/main/java/org/bukkit/entity/Mob.java

@@ -20,6 +20,13 @@ public interface Mob extends LivingEntity, Lootable {
      */
     @NotNull
     com.destroystokyo.paper.entity.Pathfinder getPathfinder();
+
+    /**
+     * Check if this mob is exposed to daylight
+     *
+     * @return True if mob is exposed to daylight
+     */
+    boolean isInDaylight();
     // Paper end
     /**
      * Instructs this Mob to set the specified LivingEntity as its target.