diff --git a/.idea/lox-space.iml b/.idea/lox-space.iml
index 5407fa9f..2ddf744f 100644
--- a/.idea/lox-space.iml
+++ b/.idea/lox-space.iml
@@ -13,6 +13,7 @@
       <sourceFolder url="file://$MODULE_DIR$/crates/lox-space/src" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/crates/lox_py/src" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/crates/lox_core/benches" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/crates/lox-time/src" isTestSource="false" />
       <excludeFolder url="file://$MODULE_DIR$/target" />
       <excludeFolder url="file://$MODULE_DIR$/tools/lox_gen/target" />
     </content>
diff --git a/Cargo.lock b/Cargo.lock
index 0f62b14d..a364f4df 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -328,9 +328,20 @@ dependencies = [
 name = "lox-space"
 version = "0.0.0"
 dependencies = [
+ "lox-time",
  "lox_core",
 ]
 
+[[package]]
+name = "lox-time"
+version = "0.1.0"
+dependencies = [
+ "num",
+ "proptest",
+ "rstest",
+ "thiserror",
+]
+
 [[package]]
 name = "lox_core"
 version = "0.1.0"
@@ -338,6 +349,7 @@ dependencies = [
  "divan",
  "float_eq",
  "glam",
+ "lox-time",
  "num",
  "proptest",
  "rstest",
@@ -355,6 +367,7 @@ dependencies = [
 name = "lox_py"
 version = "0.1.0"
 dependencies = [
+ "lox-time",
  "lox_core",
  "pyo3",
  "thiserror",
diff --git a/Cargo.toml b/Cargo.toml
index e73037a1..1d5e2375 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,8 +14,13 @@ license = "MPL-2.0"
 authors = ["Helge Eichhorn and the lox-space contributors"]
 
 [workspace.dependencies]
+divan = "0.1.2"
+lox-time = { path = "./crates/lox-time" }
 lox_core = { path = "./crates/lox_core" }
 lox_io = { path = "./crates/lox_io" }
 lox_py = { path = "./crates/lox_py" }
+num = "0.4.0"
+proptest = "1.1.0"
+rstest = "0.18.2"
 thiserror = "1.0"
 
diff --git a/crates/lox-space/Cargo.toml b/crates/lox-space/Cargo.toml
index 9bd62682..efc202c2 100644
--- a/crates/lox-space/Cargo.toml
+++ b/crates/lox-space/Cargo.toml
@@ -9,3 +9,4 @@ rust-version.workspace = true
 
 [dependencies]
 lox_core.workspace = true
+lox-time.workspace = true
diff --git a/crates/lox-space/src/prelude.rs b/crates/lox-space/src/prelude.rs
index c8ddf9d8..ec45cdee 100644
--- a/crates/lox-space/src/prelude.rs
+++ b/crates/lox-space/src/prelude.rs
@@ -10,7 +10,7 @@ pub use lox_core::bodies::barycenters::*;
 pub use lox_core::bodies::planets::*;
 pub use lox_core::bodies::{Ellipsoid, PointMass, Spheroid, TriAxial};
 
-pub use lox_core::time::dates::*;
-pub use lox_core::time::epochs::*;
+pub use lox_time::dates::*;
+pub use lox_time::epochs::*;
 
 pub use lox_core::two_body::{Cartesian, DVec3, Keplerian, TwoBody};
diff --git a/crates/lox-time/Cargo.toml b/crates/lox-time/Cargo.toml
new file mode 100644
index 00000000..2e9e23f4
--- /dev/null
+++ b/crates/lox-time/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "lox-time"
+version = "0.1.0"
+rust-version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+
+[dependencies]
+num.workspace = true
+thiserror.workspace = true
+
+[dev-dependencies]
+proptest.workspace = true
+rstest.workspace = true
diff --git a/crates/lox_core/src/time/constants.rs b/crates/lox-time/src/constants.rs
similarity index 100%
rename from crates/lox_core/src/time/constants.rs
rename to crates/lox-time/src/constants.rs
diff --git a/crates/lox_core/src/time/constants/f64.rs b/crates/lox-time/src/constants/f64.rs
similarity index 100%
rename from crates/lox_core/src/time/constants/f64.rs
rename to crates/lox-time/src/constants/f64.rs
diff --git a/crates/lox_core/src/time/constants/i64.rs b/crates/lox-time/src/constants/i64.rs
similarity index 100%
rename from crates/lox_core/src/time/constants/i64.rs
rename to crates/lox-time/src/constants/i64.rs
diff --git a/crates/lox_core/src/time/dates.rs b/crates/lox-time/src/dates.rs
similarity index 83%
rename from crates/lox_core/src/time/dates.rs
rename to crates/lox-time/src/dates.rs
index 88a790fe..b5fd05de 100644
--- a/crates/lox_core/src/time/dates.rs
+++ b/crates/lox-time/src/dates.rs
@@ -3,10 +3,10 @@
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ * file, you can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-use crate::errors::LoxError;
+use crate::errors::LoxTimeError;
 use num::ToPrimitive;
 
 #[derive(Debug, Copy, Clone)]
@@ -44,15 +44,15 @@ impl Date {
         self.day
     }
 
-    pub fn new(year: i64, month: i64, day: i64) -> Result<Self, LoxError> {
+    pub fn new(year: i64, month: i64, day: i64) -> Result<Self, LoxTimeError> {
         if !(1..=12).contains(&month) {
-            Err(LoxError::InvalidDate(year, month, day))
+            Err(LoxTimeError::InvalidDate(year, month, day))
         } else {
             let calendar = get_calendar(year, month, day);
             let check = Date::from_days(j2000(calendar, year, month, day))?;
 
             if check.year() != year || check.month() != month || check.day() != day {
-                Err(LoxError::InvalidDate(year, month, day))
+                Err(LoxTimeError::InvalidDate(year, month, day))
             } else {
                 Ok(Date {
                     calendar,
@@ -64,7 +64,7 @@ impl Date {
         }
     }
 
-    pub fn from_days(offset: i64) -> Result<Self, LoxError> {
+    pub fn from_days(offset: i64) -> Result<Self, LoxTimeError> {
         let calendar = if offset < LAST_JULIAN_DAY_J2K {
             if offset > LAST_PROLEPTIC_JULIAN_DAY_J2K {
                 Calendar::Julian
@@ -108,9 +108,9 @@ pub struct Time {
 }
 
 impl Time {
-    pub fn new(hour: i64, minute: i64, second: i64) -> Result<Self, LoxError> {
+    pub fn new(hour: i64, minute: i64, second: i64) -> Result<Self, LoxTimeError> {
         if !(0..24).contains(&hour) || !(0..60).contains(&minute) || !(0..61).contains(&second) {
-            Err(LoxError::InvalidTime(hour, minute, second))
+            Err(LoxTimeError::InvalidTime(hour, minute, second))
         } else {
             Ok(Self {
                 hour,
@@ -151,9 +151,9 @@ impl Time {
         self
     }
 
-    pub fn from_seconds(hour: i64, minute: i64, seconds: f64) -> Result<Self, LoxError> {
+    pub fn from_seconds(hour: i64, minute: i64, seconds: f64) -> Result<Self, LoxTimeError> {
         if !(0.0..61.0).contains(&seconds) {
-            return Err(LoxError::InvalidSeconds(hour, minute, seconds));
+            return Err(LoxTimeError::InvalidSeconds(hour, minute, seconds));
         }
         let sub = split_seconds(seconds.fract()).unwrap();
         let second = seconds.round().to_i64().unwrap();
@@ -253,9 +253,9 @@ fn find_month(day_in_year: i64, is_leap: bool) -> i64 {
     }
 }
 
-fn find_day(day_in_year: i64, month: i64, is_leap: bool) -> Result<i64, LoxError> {
+fn find_day(day_in_year: i64, month: i64, is_leap: bool) -> Result<i64, LoxTimeError> {
     if !is_leap && day_in_year > 365 {
-        Err(LoxError::NonLeapYear)
+        Err(LoxTimeError::NonLeapYear)
     } else {
         let previous_days = if is_leap {
             PREVIOUS_MONTH_END_DAY_LEAP
@@ -314,6 +314,7 @@ fn split_seconds(seconds: f64) -> Option<[i64; 6]> {
 mod tests {
     use super::*;
     use proptest::prelude::*;
+    use rstest::rstest;
 
     proptest! {
         #[test]
@@ -380,4 +381,47 @@ mod tests {
         assert!(split_seconds(2.0).is_none());
         assert!(split_seconds(-0.2).is_none());
     }
+
+    #[rstest]
+    #[case(-4713, 12, 31, -2451546)]
+    #[case(-4712, 1, 1, -2451545)]
+    #[case(0, 12, 31, -730122)]
+    #[case(1, 1, 1, -730121)]
+    #[case(1500, 2, 28, -182554)]
+    #[case(1500, 2, 29, -182553)]
+    #[case(1500, 3, 1, -182552)]
+    #[case(1582, 10, 4, -152385)]
+    #[case(1582, 10, 15, -152384)]
+    #[case(1600, 2, 28, -146039)]
+    #[case(1600, 2, 29, -146038)]
+    #[case(1600, 3, 1, -146037)]
+    #[case(1700, 2, 28, -109514)]
+    #[case(1700, 3, 1, -109513)]
+    #[case(1800, 2, 28, -72990)]
+    #[case(1800, 3, 1, -72989)]
+    #[case(1858, 11, 15, -51546)]
+    #[case(1858, 11, 16, -51545)]
+    #[case(1999, 12, 31, -1)]
+    #[case(2000, 1, 1, 0)]
+    #[case(2000, 2, 28, 58)]
+    #[case(2000, 2, 29, 59)]
+    #[case(2000, 3, 1, 60)]
+    fn test_dates(#[case] year: i64, #[case] month: i64, #[case] day: i64, #[case] exp: i64) {
+        let date = Date::new(year, month, day).expect("date should be valid");
+        assert_eq!(exp, date.j2000())
+    }
+
+    #[test]
+    fn test_illegal_dates() {
+        assert!(Date::new(2018, 2, 29).is_err());
+        assert!(Date::new(2018, 0, 1).is_err());
+        assert!(Date::new(2018, 13, 1).is_err());
+    }
+
+    #[test]
+    fn test_illegal_times() {
+        assert!(Time::from_seconds(24, 59, 59.0).is_err());
+        assert!(Time::from_seconds(23, 60, 59.0).is_err());
+        assert!(Time::from_seconds(23, 59, 61.0).is_err());
+    }
 }
diff --git a/crates/lox_core/src/time/epochs.rs b/crates/lox-time/src/epochs.rs
similarity index 94%
rename from crates/lox_core/src/time/epochs.rs
rename to crates/lox-time/src/epochs.rs
index 342ae24c..eb3a14f5 100644
--- a/crates/lox_core/src/time/epochs.rs
+++ b/crates/lox-time/src/epochs.rs
@@ -9,11 +9,11 @@
 use std::fmt;
 use std::fmt::Formatter;
 
-use crate::time::constants;
-use crate::time::constants::i64::{SECONDS_PER_DAY, SECONDS_PER_HOUR, SECONDS_PER_MINUTE};
 use num::ToPrimitive;
 
-use crate::time::dates::{Date, DateTime, Time};
+use crate::constants;
+use crate::constants::i64::{SECONDS_PER_DAY, SECONDS_PER_HOUR, SECONDS_PER_MINUTE};
+use crate::dates::{Date, DateTime, Time};
 
 #[derive(Debug, Copy, Clone)]
 pub enum TimeScale {
diff --git a/crates/lox-time/src/errors.rs b/crates/lox-time/src/errors.rs
new file mode 100644
index 00000000..a746731b
--- /dev/null
+++ b/crates/lox-time/src/errors.rs
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2023. Helge Eichhorn and the LOX contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum LoxTimeError {
+    #[error("invalid date `{0}-{1}-{2}`")]
+    InvalidDate(i64, i64, i64),
+    #[error("invalid time `{0}:{1}:{2}`")]
+    InvalidTime(i64, i64, i64),
+    #[error("invalid time `{0}:{1}:{2}`")]
+    InvalidSeconds(i64, i64, f64),
+    #[error("day of year cannot be 366 for a non-leap year")]
+    NonLeapYear,
+}
diff --git a/crates/lox_core/src/time.rs b/crates/lox-time/src/lib.rs
similarity index 95%
rename from crates/lox_core/src/time.rs
rename to crates/lox-time/src/lib.rs
index 954a7ffc..1aa2a301 100644
--- a/crates/lox_core/src/time.rs
+++ b/crates/lox-time/src/lib.rs
@@ -9,3 +9,4 @@
 pub mod constants;
 pub mod dates;
 pub mod epochs;
+pub mod errors;
diff --git a/crates/lox_core/Cargo.toml b/crates/lox_core/Cargo.toml
index b90e4a25..da99cec6 100644
--- a/crates/lox_core/Cargo.toml
+++ b/crates/lox_core/Cargo.toml
@@ -6,8 +6,9 @@ edition = "2021"
 [dependencies]
 float_eq = "1.0.1"
 glam = "0.24.2"
-num = "0.4.0"
+num.workspace = true
 thiserror.workspace = true
+lox-time.workspace = true
 
 [dev-dependencies]
 proptest = "1.1.0"
diff --git a/crates/lox_core/src/bodies.rs b/crates/lox_core/src/bodies.rs
index c83d2b26..e347cf21 100644
--- a/crates/lox_core/src/bodies.rs
+++ b/crates/lox_core/src/bodies.rs
@@ -8,7 +8,7 @@
 
 use std::f64::consts::PI;
 
-use crate::time::constants::f64::{SECONDS_PER_DAY, SECONDS_PER_JULIAN_CENTURY};
+use lox_time::constants::f64::{SECONDS_PER_DAY, SECONDS_PER_JULIAN_CENTURY};
 
 pub mod barycenters;
 pub mod minor;
diff --git a/crates/lox_core/src/errors.rs b/crates/lox_core/src/errors.rs
index 7ce753fb..f4bc9fec 100644
--- a/crates/lox_core/src/errors.rs
+++ b/crates/lox_core/src/errors.rs
@@ -6,16 +6,11 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
+use lox_time::errors::LoxTimeError;
 use thiserror::Error;
 
 #[derive(Error, Debug)]
 pub enum LoxError {
-    #[error("invalid date `{0}-{1}-{2}`")]
-    InvalidDate(i64, i64, i64),
-    #[error("invalid time `{0}:{1}:{2}`")]
-    InvalidTime(i64, i64, i64),
-    #[error("invalid time `{0}:{1}:{2}`")]
-    InvalidSeconds(i64, i64, f64),
-    #[error("day of year cannot be 366 for a non-leap year")]
-    NonLeapYear,
+    #[error(transparent)]
+    LoxTimeError(#[from] LoxTimeError),
 }
diff --git a/crates/lox_core/src/lib.rs b/crates/lox_core/src/lib.rs
index 97efaf5a..7cfdd0df 100644
--- a/crates/lox_core/src/lib.rs
+++ b/crates/lox_core/src/lib.rs
@@ -10,5 +10,4 @@ pub mod bodies;
 pub mod communications;
 pub mod errors;
 pub mod frames;
-pub mod time;
 pub mod two_body;
diff --git a/crates/lox_core/src/two_body.rs b/crates/lox_core/src/two_body.rs
index 0f926933..7f7586f6 100644
--- a/crates/lox_core/src/two_body.rs
+++ b/crates/lox_core/src/two_body.rs
@@ -9,8 +9,8 @@
 pub use glam::DVec3;
 
 use crate::bodies::{gravitational_parameter, PointMass};
-use crate::time::epochs::Epoch;
 use crate::two_body::elements::{cartesian_to_keplerian, keplerian_to_cartesian};
+use lox_time::epochs::Epoch;
 
 pub mod elements;
 
@@ -225,8 +225,8 @@ mod tests {
     use std::ops::Mul;
 
     use crate::bodies::planets::Earth;
-    use crate::time::dates::{Date, Time};
-    use crate::time::epochs::TimeScale;
+    use lox_time::dates::{Date, Time};
+    use lox_time::epochs::TimeScale;
 
     use super::*;
 
diff --git a/crates/lox_core/tests/dates.rs b/crates/lox_core/tests/dates.rs
deleted file mode 100644
index 6c1e2a6a..00000000
--- a/crates/lox_core/tests/dates.rs
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Copyright (c) 2023. Helge Eichhorn and the LOX contributors
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/.
- */
-
-use lox_core::time::dates::{Date, Time};
-use rstest::rstest;
-
-#[rstest]
-#[case(-4713, 12, 31, -2451546)]
-#[case(-4712, 1, 1, -2451545)]
-#[case(0, 12, 31, -730122)]
-#[case(1, 1, 1, -730121)]
-#[case(1500, 2, 28, -182554)]
-#[case(1500, 2, 29, -182553)]
-#[case(1500, 3, 1, -182552)]
-#[case(1582, 10, 4, -152385)]
-#[case(1582, 10, 15, -152384)]
-#[case(1600, 2, 28, -146039)]
-#[case(1600, 2, 29, -146038)]
-#[case(1600, 3, 1, -146037)]
-#[case(1700, 2, 28, -109514)]
-#[case(1700, 3, 1, -109513)]
-#[case(1800, 2, 28, -72990)]
-#[case(1800, 3, 1, -72989)]
-#[case(1858, 11, 15, -51546)]
-#[case(1858, 11, 16, -51545)]
-#[case(1999, 12, 31, -1)]
-#[case(2000, 1, 1, 0)]
-#[case(2000, 2, 28, 58)]
-#[case(2000, 2, 29, 59)]
-#[case(2000, 3, 1, 60)]
-fn test_dates(#[case] year: i64, #[case] month: i64, #[case] day: i64, #[case] exp: i64) {
-    let date = Date::new(year, month, day).expect("date should be valid");
-    assert_eq!(exp, date.j2000())
-}
-
-#[test]
-fn test_illegal_dates() {
-    assert!(Date::new(2018, 2, 29).is_err());
-    assert!(Date::new(2018, 0, 1).is_err());
-    assert!(Date::new(2018, 13, 1).is_err());
-}
-
-#[test]
-fn test_illegal_times() {
-    assert!(Time::from_seconds(24, 59, 59.0).is_err());
-    assert!(Time::from_seconds(23, 60, 59.0).is_err());
-    assert!(Time::from_seconds(23, 59, 61.0).is_err());
-}
diff --git a/crates/lox_py/Cargo.toml b/crates/lox_py/Cargo.toml
index 87d8ab13..7716f535 100644
--- a/crates/lox_py/Cargo.toml
+++ b/crates/lox_py/Cargo.toml
@@ -14,4 +14,5 @@ crate-type = ["cdylib"]
 [dependencies]
 pyo3 = "0.20.0"
 lox_core.workspace = true
+lox-time.workspace = true
 thiserror.workspace = true
diff --git a/crates/lox_py/src/lib.rs b/crates/lox_py/src/lib.rs
index 538dec79..d5442aa9 100644
--- a/crates/lox_py/src/lib.rs
+++ b/crates/lox_py/src/lib.rs
@@ -11,9 +11,10 @@ use pyo3::prelude::*;
 use thiserror::Error;
 
 use lox_core::errors::LoxError;
-use lox_core::time::dates::{Date, Time};
-use lox_core::time::epochs::Epoch;
-use lox_core::time::epochs::TimeScale;
+use lox_time::dates::{Date, Time};
+use lox_time::epochs::Epoch;
+use lox_time::epochs::TimeScale;
+use lox_time::errors::LoxTimeError;
 
 #[derive(Error, Debug)]
 pub enum LoxPyError {
@@ -22,6 +23,8 @@ pub enum LoxPyError {
     #[error(transparent)]
     LoxError(#[from] LoxError),
     #[error(transparent)]
+    LoxTimeError(#[from] LoxTimeError),
+    #[error(transparent)]
     PyError(#[from] PyErr),
 }
 
@@ -30,6 +33,7 @@ impl From<LoxPyError> for PyErr {
         match value {
             LoxPyError::InvalidTimeScale(_) => PyValueError::new_err(value.to_string()),
             LoxPyError::LoxError(value) => PyValueError::new_err(value.to_string()),
+            LoxPyError::LoxTimeError(value) => PyValueError::new_err(value.to_string()),
             LoxPyError::PyError(value) => value,
         }
     }