diff --git a/Cargo.lock b/Cargo.lock
index 40a39393..1aa007ce 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -153,9 +153,9 @@ dependencies = [
 
 [[package]]
 name = "async-compression"
-version = "0.4.13"
+version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e614738943d3f68c628ae3dbce7c3daffb196665f82f8c8ea6b65de73c79429"
+checksum = "998282f8f49ccd6116b0ed8a4de0fbd3151697920e7c7533416d6e25e76434a7"
 dependencies = [
  "futures-core",
  "memchr",
@@ -679,18 +679,18 @@ dependencies = [
 
 [[package]]
 name = "derive_builder"
-version = "0.20.1"
+version = "0.20.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd33f37ee6a119146a1781d3356a7c26028f83d779b2e04ecd45fdc75c76877b"
+checksum = "507dfb09ea8b7fa618fcf76e953f4f5e192547945816d5358edffe39f6f94947"
 dependencies = [
  "derive_builder_macro",
 ]
 
 [[package]]
 name = "derive_builder_core"
-version = "0.20.1"
+version = "0.20.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7431fa049613920234f22c47fdc33e6cf3ee83067091ea4277a3f8c4587aae38"
+checksum = "2d5bcf7b024d6835cfb3d473887cd966994907effbe9227e8c8219824d06c4e8"
 dependencies = [
  "darling",
  "proc-macro2",
@@ -700,9 +700,9 @@ dependencies = [
 
 [[package]]
 name = "derive_builder_macro"
-version = "0.20.1"
+version = "0.20.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4abae7035bf79b9877b779505d8cf3749285b80c43941eda66604841889451dc"
+checksum = "ab63b0e2bf4d5928aff72e83a7dace85d7bba5fe12dcc3c5a572d78caffd3f3c"
 dependencies = [
  "derive_builder_core",
  "syn",
@@ -868,6 +868,7 @@ dependencies = [
  "img-parts",
  "indexmap",
  "jieba-rs",
+ "jiff",
  "latex2mathml",
  "mozjpeg",
  "nanoid",
@@ -1387,6 +1388,12 @@ dependencies = [
  "regex",
 ]
 
+[[package]]
+name = "jiff"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a45489186a6123c128fdf6016183fcfab7113e1820eb813127e036e287233fb"
+
 [[package]]
 name = "jobserver"
 version = "0.1.32"
@@ -1398,9 +1405,9 @@ dependencies = [
 
 [[package]]
 name = "js-sys"
-version = "0.3.70"
+version = "0.3.71"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1868808506b929d7b0cfa8f75951347aa71bb21144b7791bae35d9bccfcfe37a"
+checksum = "0cb94a0ffd3f3ee755c20f7d8752f45cac88605a4dcf808abcff72873296ec7b"
 dependencies = [
  "wasm-bindgen",
 ]
@@ -3156,9 +3163,9 @@ checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.93"
+version = "0.2.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a82edfc16a6c469f5f44dc7b571814045d60404b55a0ee849f9bcfa2e63dd9b5"
+checksum = "ef073ced962d62984fb38a36e5fdc1a2b23c9e0e1fa0689bb97afa4202ef6887"
 dependencies = [
  "cfg-if",
  "once_cell",
@@ -3167,9 +3174,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.93"
+version = "0.2.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9de396da306523044d3302746f1208fa71d7532227f15e347e2d93e4145dd77b"
+checksum = "c4bfab14ef75323f4eb75fa52ee0a3fb59611977fd3240da19b2cf36ff85030e"
 dependencies = [
  "bumpalo",
  "log",
@@ -3182,9 +3189,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.43"
+version = "0.4.44"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61e9300f63a621e96ed275155c108eb6f843b6a26d053f122ab69724559dc8ed"
+checksum = "65471f79c1022ffa5291d33520cbbb53b7687b01c2f8e83b57d102eed7ed479d"
 dependencies = [
  "cfg-if",
  "js-sys",
@@ -3194,9 +3201,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.93"
+version = "0.2.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "585c4c91a46b072c92e908d99cb1dcdf95c5218eeb6f3bf1efa991ee7a68cccf"
+checksum = "a7bec9830f60924d9ceb3ef99d55c155be8afa76954edffbb5936ff4509474e7"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -3204,9 +3211,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.93"
+version = "0.2.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "afc340c74d9005395cf9dd098506f7f44e38f2b4a21c6aaacf9a105ea5e1e836"
+checksum = "4c74f6e152a76a2ad448e223b0fc0b6b5747649c3d769cc6bf45737bf97d0ed6"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3217,15 +3224,15 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.93"
+version = "0.2.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c62a0a307cb4a311d3a07867860911ca130c3494e8c2719593806c08bc5d0484"
+checksum = "a42f6c679374623f295a8623adfe63d9284091245c3504bde47c17a3ce2777d9"
 
 [[package]]
 name = "web-sys"
-version = "0.3.70"
+version = "0.3.71"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26fdeaafd9bd129f65e7c031593c24d62186301e0c72c8978fa1678be7d532c0"
+checksum = "44188d185b5bdcae1052d08bcbcf9091a5524038d4572cc4f4f2bb9d5554ddd9"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
diff --git a/Cargo.toml b/Cargo.toml
index 7b27f084..230c9808 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,6 +26,7 @@ image = { version = "0.25.2", default-features = false, features = ["jpeg", "png
 img-parts = "0.3.0"
 indexmap = "2"
 jieba-rs = "0.7.0"
+jiff = { version = "0.1.13", default-features = false, features = ["std"] }
 latex2mathml = "0.2.3"
 mozjpeg = "0.10.10"
 nanoid = "0.4.0"
diff --git a/src/controller/db_utils.rs b/src/controller/db_utils.rs
index 37ae6c8d..4cb66f32 100644
--- a/src/controller/db_utils.rs
+++ b/src/controller/db_utils.rs
@@ -1,7 +1,7 @@
 use super::meta_handler::ParamsPage;
 use crate::error::AppError;
 use bincode::{config::standard, Decode, Encode};
-use chrono::Utc;
+use jiff::Timestamp;
 use nanoid::nanoid;
 use sled::{Db, IVec, Iter, Tree};
 use std::iter::Rev;
@@ -18,7 +18,7 @@ pub async fn clear_invalid(db: &Db, tree_name: &str) -> Result<(), AppError> {
             .split_once('_')
             .and_then(|s| i64::from_str_radix(s.0, 16).ok());
         if let Some(time_stamp) = time_stamp {
-            if time_stamp < Utc::now().timestamp() {
+            if time_stamp < Timestamp::now().as_second() {
                 tree.remove(k)?;
             }
         }
@@ -382,7 +382,7 @@ pub(super) fn get_id_by_name(
 /// ```
 pub(super) fn generate_nanoid_ttl(seconds: i64) -> String {
     let nanoid = nanoid!();
-    let exp = Utc::now().timestamp() + seconds;
+    let exp = Timestamp::now().as_second() + seconds;
     format!("{exp:x}_{nanoid}")
 }
 
diff --git a/src/controller/feed.rs b/src/controller/feed.rs
index 595f10bc..3cb4cae4 100644
--- a/src/controller/feed.rs
+++ b/src/controller/feed.rs
@@ -25,8 +25,8 @@ use axum_extra::{
     TypedHeader,
 };
 use cached::proc_macro::cached;
-use chrono::{DateTime, Utc};
 use garde::Validate;
+use jiff::Timestamp;
 use reqwest::Client;
 use serde::Deserialize;
 use sled::Db;
@@ -48,13 +48,13 @@ impl TryFrom<rss::Item> for SourceItem {
     type Error = AppError;
     fn try_from(rss: rss::Item) -> Result<Self, Self::Error> {
         let updated = if let Some(ref pub_date) = rss.pub_date {
-            if let Ok(ts) = DateTime::parse_from_rfc2822(pub_date) {
-                ts.timestamp()
+            if let Ok(ts) = pub_date.parse::<Timestamp>() {
+                ts.as_second()
             } else {
-                Utc::now().timestamp()
+                Timestamp::now().as_second()
             }
         } else {
-            Utc::now().timestamp()
+            Timestamp::now().as_second()
         };
 
         let Some(link) = rss.link else {
@@ -791,7 +791,7 @@ pub(crate) async fn feed_star(
         if star_tree.contains_key(&k)? {
             star_tree.remove(&k)?;
         } else {
-            let now = Utc::now().timestamp();
+            let now = Timestamp::now().as_second();
             star_tree.insert(&k, i64_to_ivec(now))?;
         }
     }
diff --git a/src/controller/fmt.rs b/src/controller/fmt.rs
index 0e3f8c13..cf3f4a43 100644
--- a/src/controller/fmt.rs
+++ b/src/controller/fmt.rs
@@ -1,14 +1,14 @@
 use std::sync::LazyLock;
 
-use chrono::DateTime;
+use jiff::Timestamp;
 use pulldown_cmark::{html, CodeBlockKind, Event, Options, Tag};
 use syntect::{highlighting::ThemeSet, html::highlighted_html_for_string, parsing::SyntaxSet};
 
 /// convert a `i64` timestamp to a date [`String`]
 pub(super) fn ts_to_date(timestamp: i64) -> String {
-    DateTime::from_timestamp(timestamp, 0)
+    Timestamp::from_second(timestamp)
         .unwrap()
-        .format("%Y-%m-%d")
+        .strftime("%Y-%m-%d")
         .to_string()
 }
 
diff --git a/src/controller/inn.rs b/src/controller/inn.rs
index 576f905d..121427ac 100644
--- a/src/controller/inn.rs
+++ b/src/controller/inn.rs
@@ -43,6 +43,7 @@ use bincode::config::standard;
 use cached::proc_macro::cached;
 use chrono::{DateTime, Utc};
 use garde::Validate;
+use jiff::Timestamp;
 use serde::Deserialize;
 use sled::{transaction::ConflictableTransactionError, Transactional};
 use sled::{Batch, Db};
@@ -308,7 +309,7 @@ pub(crate) async fn mod_inn_post(
         topics,
         inn_type: inn_type as u8,
         early_birds: input.early_birds,
-        created_at: Utc::now().timestamp(),
+        created_at: Timestamp::now().as_second(),
         limit_edit_seconds: input.limit_edit_seconds,
     };
 
@@ -579,7 +580,7 @@ pub(crate) async fn edit_post(
         let mut post: Post = get_one(&DB, "posts", pid)?;
         let inn: Inn = get_one(&DB, "inns", post.iid)?;
 
-        if (post.created_at + (inn.limit_edit_seconds as i64) < Utc::now().timestamp())
+        if (post.created_at + (inn.limit_edit_seconds as i64) < Timestamp::now().as_second())
             && inn.limit_edit_seconds != 0
         {
             return Err(AppError::Unauthorized);
@@ -691,7 +692,7 @@ pub(crate) async fn edit_post_post(
         return Err(AppError::Unauthorized);
     }
 
-    let mut created_at = Utc::now().timestamp();
+    let mut created_at = Timestamp::now().as_second();
     if created_at - claim.last_write < site_config.post_interval {
         return Err(AppError::WriteInterval);
     }
@@ -1580,7 +1581,8 @@ pub(crate) async fn post(
 
         if is_author
             && (inn.limit_edit_seconds == 0
-                || post.created_at + (inn.limit_edit_seconds as i64) >= Utc::now().timestamp())
+                || post.created_at + (inn.limit_edit_seconds as i64)
+                    >= Timestamp::now().as_second())
         {
             can_edit = true;
         }
@@ -1619,7 +1621,7 @@ pub(crate) async fn post(
         PostStatus::HiddenByMod => "<p><i>Hidden by mod.</i></p>".into(),
         PostStatus::HiddenByUser => "<p><i>Hidden by user.</i></p>".into(),
         _ => {
-            let diff = (Utc::now().timestamp() - post.created_at) / 24 / 3600;
+            let diff = (Timestamp::now().as_second() - post.created_at) / 24 / 3600;
             if diff > 30 {
                 let mut content = format!(
                     r#"
@@ -1799,7 +1801,7 @@ pub(crate) async fn comment_post(
         return Err(AppError::NotFound);
     }
 
-    let created_at = Utc::now().timestamp();
+    let created_at = Timestamp::now().as_second();
     if created_at - claim.last_write < site_config.comment_interval {
         return Err(AppError::WriteInterval);
     }
diff --git a/src/controller/mod.rs b/src/controller/mod.rs
index 88797f93..8a596243 100644
--- a/src/controller/mod.rs
+++ b/src/controller/mod.rs
@@ -138,8 +138,8 @@ use crate::error::AppError;
 use ::tantivy::TantivyDocument;
 use bincode::config::standard;
 use bincode::{Decode, Encode};
-use chrono::{Days, Utc};
 use garde::Validate;
+use jiff::{RoundMode, Timestamp, TimestampRound, ToSpan, Unit};
 use serde::{Deserialize, Serialize};
 use sled::Db;
 use std::fmt::Display;
@@ -204,14 +204,16 @@ impl User {
     }
 
     fn update_stats(db: &Db, uid: u32, stat_type: &str) -> Result<(), AppError> {
-        let expire = Utc::now()
-            .date_naive()
-            .checked_add_days(Days::new(3))
+        let expire = Timestamp::now()
+            .round(
+                TimestampRound::new()
+                    .smallest(Unit::Day)
+                    .mode(RoundMode::Trunc),
+            )
             .unwrap()
-            .and_hms_opt(0, 0, 0)
+            .checked_add(3.day())
             .unwrap()
-            .and_utc()
-            .timestamp();
+            .as_second();
         let key = format!("{expire:x}_{uid}_{stat_type}");
         incr_id(&db.open_tree("user_stats")?, key)?;
         Ok(())
diff --git a/src/controller/solo.rs b/src/controller/solo.rs
index 801f7cfe..bcf1de94 100644
--- a/src/controller/solo.rs
+++ b/src/controller/solo.rs
@@ -23,8 +23,8 @@ use axum_extra::{
     TypedHeader,
 };
 use axum_garde::WithValidation;
-use chrono::Utc;
 use garde::Validate;
+use jiff::Timestamp;
 use serde::Deserialize;
 use sled::Db;
 use tracing::warn;
@@ -395,7 +395,7 @@ pub(crate) async fn solo_post(
         }
     }
 
-    let created_at = Utc::now().timestamp();
+    let created_at = Timestamp::now().as_second();
     if created_at - claim.last_write < site_config.solo_interval {
         return Err(AppError::WriteInterval);
     }
diff --git a/src/controller/user.rs b/src/controller/user.rs
index e0588141..38827be1 100644
--- a/src/controller/user.rs
+++ b/src/controller/user.rs
@@ -23,10 +23,10 @@ use axum_extra::{headers::Cookie, TypedHeader};
 use axum_garde::WithValidation;
 use bincode::config::standard;
 use captcha::{CaptchaName, Difficulty};
-use chrono::Utc;
 use data_encoding::BASE64;
 use garde::Validate;
 use identicon::Identicon;
+use jiff::Timestamp;
 use ring::{
     pbkdf2,
     rand::{self, SecureRandom},
@@ -950,7 +950,7 @@ pub(crate) async fn signup_post(
     let avatar = format!("{}/{}.png", &CONFIG.avatars_path, uid);
     Identicon::new(&generate_salt()).image().save(avatar)?;
 
-    let created_at = Utc::now().timestamp();
+    let created_at = Timestamp::now().as_second();
     let role = if uid == 1 {
         Role::Admin
     } else {
@@ -1108,9 +1108,9 @@ impl Claim {
         let timestamp = session.split_once('_')?.0;
         let tree = &db.open_tree("sessions").ok()?;
         let timestamp = i64::from_str_radix(timestamp, 16).ok()?;
-        let now = Utc::now();
+        let now = Timestamp::now();
 
-        if timestamp < now.timestamp() {
+        if timestamp < now.as_second() {
             tree.remove(session).ok()?;
             return None;
         }
@@ -1129,7 +1129,7 @@ impl Claim {
     }
 
     pub(super) fn update_last_write(mut self, db: &Db) -> Result<(), AppError> {
-        self.last_write = Utc::now().timestamp();
+        self.last_write = Timestamp::now().as_second();
         set_one_with_key(db, "sessions", &self.session_id, &self)?;
 
         Ok(())
@@ -1157,7 +1157,7 @@ impl Claim {
             return Err(AppError::Banned);
         }
         let seconds = expire_seconds(expiry);
-        let now = Utc::now().timestamp();
+        let now = Timestamp::now().as_second();
         let session_id = generate_nanoid_ttl(seconds);
 
         let claim = Claim {