diff --git a/Cargo.lock b/Cargo.lock
index 7f47489..67b64d8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -106,9 +106,9 @@ dependencies = [
  "clap",
  "comemo",
  "fontdb 0.22.0",
+ "jiff",
  "maud",
  "serde",
- "time",
  "tokio",
  "typst",
  "typst-pdf",
@@ -1144,6 +1144,31 @@ version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49f1f14873335454500d59611f1cf4a4b0f786f9ac11f4312a78e4cf2566695b"
 
+[[package]]
+name = "jiff"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a45489186a6123c128fdf6016183fcfab7113e1820eb813127e036e287233fb"
+dependencies = [
+ "jiff-tzdb-platform",
+ "windows-sys 0.59.0",
+]
+
+[[package]]
+name = "jiff-tzdb"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91335e575850c5c4c673b9bd467b0e025f164ca59d0564f69d0c2ee0ffad4653"
+
+[[package]]
+name = "jiff-tzdb-platform"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9835f0060a626fe59f160437bc725491a6af23133ea906500027d1bd2f8f4329"
+dependencies = [
+ "jiff-tzdb",
+]
+
 [[package]]
 name = "jpeg-decoder"
 version = "0.3.1"
@@ -1343,15 +1368,6 @@ dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "num_threads"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c7398b9c8b70908f6371f47ed36737907c87c52af34c268fed0bf0ceb92ead9"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "numerals"
 version = "0.1.4"
@@ -2141,9 +2157,7 @@ checksum = "5dfd88e563464686c916c7e46e623e520ddc6d79fa6641390f2e3fa86e83e885"
 dependencies = [
  "deranged",
  "itoa",
- "libc",
  "num-conv",
- "num_threads",
  "powerfmt",
  "serde",
  "time-core",
diff --git a/Cargo.toml b/Cargo.toml
index a84aa38..2458087 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,9 +10,9 @@ axum-extra = { version = "0.9.4", features = ["form"] }
 clap = { version = "4.5.20", features = ["derive", "deprecated"] }
 comemo = "0.4.0"
 fontdb = "0.22.0"
+jiff = "0.1.13"
 maud = { version = "0.26.0", features = ["axum"] }
 serde = { version = "1.0.210", features = ["derive"] }
-time = { version = "0.3.36", features = ["macros", "formatting", "local-offset"] }
 tokio = { version = "1.40.0", features = ["full"] }
 typst = "0.11.1"
 typst-pdf = "0.11.1"
diff --git a/src/endpoints/index.rs b/src/endpoints/index.rs
index d687caf..48d30b5 100644
--- a/src/endpoints/index.rs
+++ b/src/endpoints/index.rs
@@ -3,9 +3,9 @@ use axum::{
     response::{IntoResponse, Response},
 };
 use axum_extra::extract::Form;
+use jiff::{ToSpan, Zoned};
 use maud::{html, Markup, PreEscaped};
 use serde::Deserialize;
-use time::{macros::format_description, OffsetDateTime};
 
 use crate::{
     endpoints::page,
@@ -13,9 +13,12 @@ use crate::{
 };
 
 pub async fn get() -> Markup {
-    let now = OffsetDateTime::now_local().unwrap_or_else(|_| OffsetDateTime::now_utc());
-    let month = now.date().replace_day(1).unwrap().previous_day().unwrap();
-    let month = month.format(format_description!("[year]-[month]")).unwrap();
+    // We assume that people still want to fill out the previous month's time
+    // sheet during the first two weeks of the following month.
+    let month = Zoned::now()
+        .checked_sub(2.weeks())
+        .unwrap()
+        .strftime("%Y-%m");
 
     page(
         html! {