diff --git a/server/src/lib.rs b/server/src/lib.rs
index a6fe41da1c..371a28db3b 100644
--- a/server/src/lib.rs
+++ b/server/src/lib.rs
@@ -362,10 +362,7 @@ impl Server {
         );
 
         #[cfg(feature = "worldgen")]
-        let map = world.get_map_data(
-            index.as_index_ref(),
-            state.thread_pool(),
-        );
+        let map = world.get_map_data(index.as_index_ref(), state.thread_pool());
 
         #[cfg(not(feature = "worldgen"))]
         let (world, index) = World::generate(settings.world_seed);
diff --git a/world/src/lib.rs b/world/src/lib.rs
index 3709748651..8ea10f135f 100644
--- a/world/src/lib.rs
+++ b/world/src/lib.rs
@@ -120,11 +120,7 @@ impl World {
         // TODO
     }
 
-    pub fn get_map_data(
-        &self,
-        index: IndexRef,
-        threadpool: &rayon::ThreadPool,
-    ) -> WorldMapMsg {
+    pub fn get_map_data(&self, index: IndexRef, threadpool: &rayon::ThreadPool) -> WorldMapMsg {
         threadpool.install(|| {
             // we need these numbers to create unique ids for cave ends
             let num_sites = self.civs().sites().count() as u64;
diff --git a/world/src/sim/mod.rs b/world/src/sim/mod.rs
index 2e2fdd15aa..edbc4330b4 100644
--- a/world/src/sim/mod.rs
+++ b/world/src/sim/mod.rs
@@ -395,7 +395,7 @@ pub struct WorldSim {
 impl WorldSim {
     pub fn generate(seed: u32, opts: WorldOpts, threadpool: &rayon::ThreadPool) -> Self {
         let calendar = opts.calendar; // separate lifetime of elements
-        let world_file = opts.world_file; 
+        let world_file = opts.world_file;
         // Parse out the contents of various map formats into the values we need.
         let parsed_world_file = (|| {
             let map = match world_file {
diff --git a/world/src/site/settlement/building/mod.rs b/world/src/site/settlement/building/mod.rs
index 5b7336e0f7..b7170277a6 100644
--- a/world/src/site/settlement/building/mod.rs
+++ b/world/src/site/settlement/building/mod.rs
@@ -8,7 +8,7 @@ pub use self::{
 };
 
 use crate::IndexRef;
-use common::terrain::Block;
+use common::{calendar::Calendar, terrain::Block};
 use rand::prelude::*;
 use serde::Deserialize;
 use vek::*;
@@ -25,7 +25,7 @@ pub struct Building<A: Archetype> {
 }
 
 impl<A: Archetype> Building<A> {
-    pub fn generate(rng: &mut impl Rng, origin: Vec3<i32>) -> Self
+    pub fn generate(rng: &mut impl Rng, origin: Vec3<i32>, calendar: Option<&Calendar>) -> Self
     where
         A: Sized,
     {
diff --git a/world/src/site/settlement/mod.rs b/world/src/site/settlement/mod.rs
index 6a0a7a8b52..66fca1d733 100644
--- a/world/src/site/settlement/mod.rs
+++ b/world/src/site/settlement/mod.rs
@@ -440,11 +440,13 @@ impl Settlement {
                             StructureKind::Keep(Building::<Keep>::generate(
                                 ctx.rng,
                                 Vec3::new(house_pos.x, house_pos.y, alt),
+                                None,
                             ))
                         } else {
                             StructureKind::House(Building::<House>::generate(
                                 ctx.rng,
                                 Vec3::new(house_pos.x, house_pos.y, alt),
+                                ctx.sim.map(|sim| sim.calendar.as_ref()).flatten(),
                             ))
                         },
                     };