diff --git a/Cargo.lock b/Cargo.lock
index 1491aa11..c483d96b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -26,21 +26,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "android-tzdata"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
-
-[[package]]
-name = "android_system_properties"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "anes"
 version = "0.1.6"
@@ -403,12 +388,6 @@ dependencies = [
  "piper",
 ]
 
-[[package]]
-name = "bumpalo"
-version = "3.17.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1628fb46dfa0b37568d12e5edd512553eccf6a22a78e8bde00bb4aed84d5bdbf"
-
 [[package]]
 name = "byteorder"
 version = "1.5.0"
@@ -451,20 +430,6 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 
-[[package]]
-name = "chrono"
-version = "0.4.40"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a7964611d71df112cb1730f2ee67324fcf4d0fc6606acbbe9bfe06df124637c"
-dependencies = [
- "android-tzdata",
- "iana-time-zone",
- "js-sys",
- "num-traits",
- "wasm-bindgen",
- "windows-link",
-]
-
 [[package]]
 name = "ciborium"
 version = "0.2.2"
@@ -540,7 +505,6 @@ dependencies = [
  "approx",
  "axum",
  "bitvec",
- "chrono",
  "crc",
  "ethercat_hal",
  "ethercrab",
@@ -553,12 +517,6 @@ dependencies = [
  "uom",
 ]
 
-[[package]]
-name = "core-foundation-sys"
-version = "0.8.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
-
 [[package]]
 name = "cpufeatures"
 version = "0.2.17"
@@ -1255,30 +1213,6 @@ dependencies = [
  "tower-service",
 ]
 
-[[package]]
-name = "iana-time-zone"
-version = "0.1.63"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0c919e5debc312ad217002b8048a17b7d83f80703865bbfcfebb0458b0b27d8"
-dependencies = [
- "android_system_properties",
- "core-foundation-sys",
- "iana-time-zone-haiku",
- "js-sys",
- "log",
- "wasm-bindgen",
- "windows-core",
-]
-
-[[package]]
-name = "iana-time-zone-haiku"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f31827a206f56af32e590ba56d5d2d085f558508192593743f16b2306495269f"
-dependencies = [
- "cc",
-]
-
 [[package]]
 name = "if_chain"
 version = "1.0.2"
@@ -1406,16 +1340,6 @@ dependencies = [
  "syn 2.0.101",
 ]
 
-[[package]]
-name = "js-sys"
-version = "0.3.77"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1cfaf33c695fc6e08064efbc1f72ec937429614f25eef83af942d0e227c3a28f"
-dependencies = [
- "once_cell",
- "wasm-bindgen",
-]
-
 [[package]]
 name = "lazy_static"
 version = "1.5.0"
@@ -2005,7 +1929,6 @@ dependencies = [
  "approx",
  "axum",
  "bitvec",
- "chrono",
  "control_core",
  "env_logger",
  "ethercat_hal",
@@ -2532,64 +2455,6 @@ dependencies = [
  "wit-bindgen-rt",
 ]
 
-[[package]]
-name = "wasm-bindgen"
-version = "0.2.100"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1edc8929d7499fc4e8f0be2262a241556cfc54a0bea223790e71446f2aab1ef5"
-dependencies = [
- "cfg-if",
- "once_cell",
- "rustversion",
- "wasm-bindgen-macro",
-]
-
-[[package]]
-name = "wasm-bindgen-backend"
-version = "0.2.100"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f0a0651a5c2bc21487bde11ee802ccaf4c51935d0d3d42a6101f98161700bc6"
-dependencies = [
- "bumpalo",
- "log",
- "proc-macro2",
- "quote",
- "syn 2.0.101",
- "wasm-bindgen-shared",
-]
-
-[[package]]
-name = "wasm-bindgen-macro"
-version = "0.2.100"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fe63fc6d09ed3792bd0897b314f53de8e16568c2b3f7982f468c0bf9bd0b407"
-dependencies = [
- "quote",
- "wasm-bindgen-macro-support",
-]
-
-[[package]]
-name = "wasm-bindgen-macro-support"
-version = "0.2.100"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ae87ea40c9f689fc23f209965b6fb8a99ad69aeeb0231408be24920604395de"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.101",
- "wasm-bindgen-backend",
- "wasm-bindgen-shared",
-]
-
-[[package]]
-name = "wasm-bindgen-shared"
-version = "0.2.100"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a05d73b933a847d6cccdda8f838a22ff101ad9bf93e33684f39c1f5f0eece3d"
-dependencies = [
- "unicode-ident",
-]
-
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -2621,65 +2486,6 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
-[[package]]
-name = "windows-core"
-version = "0.61.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4763c1de310c86d75a878046489e2e5ba02c649d185f21c67d4cf8a56d098980"
-dependencies = [
- "windows-implement",
- "windows-interface",
- "windows-link",
- "windows-result",
- "windows-strings",
-]
-
-[[package]]
-name = "windows-implement"
-version = "0.60.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a47fddd13af08290e67f4acabf4b459f647552718f683a7b415d290ac744a836"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.101",
-]
-
-[[package]]
-name = "windows-interface"
-version = "0.59.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd9211b69f8dcdfa817bfd14bf1c97c9188afa36f4750130fcdf3f400eca9fa8"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.101",
-]
-
-[[package]]
-name = "windows-link"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "76840935b766e1b0a05c0066835fb9ec80071d4c09a16f6bd5f7e655e3c14c38"
-
-[[package]]
-name = "windows-result"
-version = "0.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c64fd11a4fd95df68efcfee5f44a294fe71b8bc6a91993e2791938abcc712252"
-dependencies = [
- "windows-link",
-]
-
-[[package]]
-name = "windows-strings"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a2ba9642430ee452d5a7aa78d72907ebe8cfda358e8cb7918a2050581322f97"
-dependencies = [
- "windows-link",
-]
-
 [[package]]
 name = "windows-sys"
 version = "0.36.1"
diff --git a/control-core/Cargo.toml b/control-core/Cargo.toml
index 8d17b203..5a0266e9 100644
--- a/control-core/Cargo.toml
+++ b/control-core/Cargo.toml
@@ -6,7 +6,6 @@ edition = "2024"
 [dependencies]
 anyhow = "1.0.98"
 axum = "0.8.3"
-chrono = "0.4.40"
 ethercat_hal = { path = "../ethercat-hal" }
 ethercrab = "0.6"
 interfaces = "0.0.9"
diff --git a/control-core/src/socketio/event.rs b/control-core/src/socketio/event.rs
index e6d6f14b..df223019 100644
--- a/control-core/src/socketio/event.rs
+++ b/control-core/src/socketio/event.rs
@@ -1,3 +1,5 @@
+use std::time::{SystemTime, UNIX_EPOCH};
+
 use serde::Serialize;
 use serde_json::Value;
 
@@ -6,7 +8,7 @@ pub struct GenericEvent {
     pub name: String,
     pub data: Value,
     /// Timestamp in milliseconds
-    pub ts: i64,
+    pub ts: u64,
 }
 
 #[derive(Debug, Clone, Serialize)]
@@ -17,7 +19,7 @@ where
     pub name: String,
     pub data: T,
     /// Timestamp in milliseconds
-    pub ts: i64,
+    pub ts: u64,
 }
 
 impl<T> TryFrom<Event<T>> for GenericEvent
@@ -58,7 +60,10 @@ where
         Self {
             name: event.to_string(),
             data,
-            ts: chrono::Utc::now().timestamp_millis(),
+            ts: SystemTime::now()
+                .duration_since(UNIX_EPOCH)
+                .unwrap()
+                .as_millis() as u64,
         }
     }
 }
diff --git a/control-core/src/socketio/namespace.rs b/control-core/src/socketio/namespace.rs
index 91d4c461..9fc1b041 100644
--- a/control-core/src/socketio/namespace.rs
+++ b/control-core/src/socketio/namespace.rs
@@ -1,6 +1,10 @@
 use crate::socketio::event::GenericEvent;
 use socketioxide::extract::SocketRef;
-use std::{collections::HashMap, time::Duration};
+use std::{
+    alloc::System,
+    collections::HashMap,
+    time::{Duration, Instant, SystemTime, UNIX_EPOCH},
+};
 
 pub trait NamespaceInterface {
     /// Adds a socket to the namespace.
@@ -171,9 +175,11 @@ pub fn cache_one_event() -> CacheFn {
 /// [BufferFn] that stores events for a certain duration
 pub fn cache_duration(duration: Duration) -> CacheFn {
     Box::new(move |events, event| {
-        let now = chrono::Utc::now();
-        let cutoff_time = now - chrono::Duration::from_std(duration).unwrap_or_default();
-        let cutoff_millis = cutoff_time.timestamp_millis();
+        let now = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .expect("System time before UNIX EPOCH");
+        let cutoff_time = now - duration;
+        let cutoff_millis = cutoff_time.as_millis() as u64;
 
         // Since events are ordered by increasing ts, we can find the first index
         // that should be kept and truncate everything before it
diff --git a/server/Cargo.toml b/server/Cargo.toml
index 6aa67684..7772d6e2 100644
--- a/server/Cargo.toml
+++ b/server/Cargo.toml
@@ -22,7 +22,6 @@ axum = { version = "0.8.3", features = ["macros"] }
 
 # utility
 uom = "0.36.0"
-chrono = "0.4.39"
 serde = "1.0.217"
 anyhow = "1.0.98"
 serde_json = "1.0.137"
diff --git a/server/src/machines/winder2/act.rs b/server/src/machines/winder2/act.rs
index 0a4eee63..52cbd75b 100644
--- a/server/src/machines/winder2/act.rs
+++ b/server/src/machines/winder2/act.rs
@@ -1,4 +1,4 @@
-use std::time::Instant;
+use std::time::{Duration, Instant};
 
 use super::Winder2;
 use control_core::actors::Actor;
@@ -19,8 +19,8 @@ impl Actor for Winder2 {
             self.sync_spool_speed(now);
 
             // if last measurement emit is older than 1 second, emit a new measurement
-            let now = chrono::Utc::now();
-            if (now - self.last_measurement_emit).num_milliseconds() > 16 {
+            let now = Instant::now();
+            if now.duration_since(self.last_measurement_emit) > Duration::from_millis(16) {
                 self.emit_tension_arm_angle();
                 self.emit_spool_rpm();
                 self.last_measurement_emit = now;
diff --git a/server/src/machines/winder2/mod.rs b/server/src/machines/winder2/mod.rs
index beae946b..e14cb3bd 100644
--- a/server/src/machines/winder2/mod.rs
+++ b/server/src/machines/winder2/mod.rs
@@ -12,7 +12,6 @@ use api::{
     ModeStateEvent, TensionArmAngleEvent, TensionArmStateEvent, TraverseStateEvent, Winder1Events,
     Winder1Namespace,
 };
-use chrono::DateTime;
 use control_core::{
     actors::{
         digital_output_setter::DigitalOutputSetter, stepper_driver_el70x1::StepperDriverEL70x1,
@@ -36,7 +35,7 @@ pub struct Winder2 {
 
     // socketio
     namespace: Winder1Namespace,
-    last_measurement_emit: DateTime<chrono::Utc>,
+    last_measurement_emit: Instant,
 
     // mode
     pub mode: Winder2Mode,
diff --git a/server/src/machines/winder2/new.rs b/server/src/machines/winder2/new.rs
index 1184bcdb..db3e7f80 100644
--- a/server/src/machines/winder2/new.rs
+++ b/server/src/machines/winder2/new.rs
@@ -1,3 +1,5 @@
+use std::time::Instant;
+
 use super::api::Winder1Namespace;
 use super::linear_spool_speed_controller::LinearSpoolSpeedController;
 use super::tension_arm::TensionArm;
@@ -296,7 +298,7 @@ impl MachineNewTrait for Winder2 {
                 mode: Winder2Mode::Standby,
                 spool_step_converter: StepConverter::new(200),
                 spool_speed_controller: Box::new(LinearSpoolSpeedController::new(200.0, 1250.0)),
-                last_measurement_emit: chrono::Utc::now(),
+                last_measurement_emit: Instant::now(),
             };
 
             // Role 5