diff --git a/src/month.rs b/src/month.rs
index 146a98ebe5..cc6c617a1f 100644
--- a/src/month.rs
+++ b/src/month.rs
@@ -31,6 +31,10 @@ use crate::OutOfRange;
 #[derive(PartialEq, Eq, Copy, Clone, Debug, Hash, PartialOrd, Ord)]
 #[cfg_attr(feature = "rustc-serialize", derive(RustcEncodable, RustcDecodable))]
 #[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
+#[cfg_attr(
+    feature = "rkyv",
+    archive_attr(derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug, Hash))
+)]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
 pub enum Month {
     /// January
diff --git a/src/naive/date.rs b/src/naive/date.rs
index 860593498d..9e6687ffdf 100644
--- a/src/naive/date.rs
+++ b/src/naive/date.rs
@@ -192,6 +192,10 @@ impl Days {
 /// [proleptic Gregorian date]: crate::NaiveDate#calendar-date
 #[derive(PartialEq, Eq, Hash, PartialOrd, Ord, Copy, Clone)]
 #[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
+#[cfg_attr(
+    feature = "rkyv",
+    archive_attr(derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug, Hash))
+)]
 pub struct NaiveDate {
     ymdf: DateImpl, // (year << 13) | of
 }
diff --git a/src/naive/datetime/mod.rs b/src/naive/datetime/mod.rs
index 09268aeffd..596c95ca97 100644
--- a/src/naive/datetime/mod.rs
+++ b/src/naive/datetime/mod.rs
@@ -74,6 +74,10 @@ pub const MAX_DATETIME: NaiveDateTime = NaiveDateTime::MAX;
 /// ```
 #[derive(PartialEq, Eq, Hash, PartialOrd, Ord, Copy, Clone)]
 #[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
+#[cfg_attr(
+    feature = "rkyv",
+    archive_attr(derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug, Hash))
+)]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
 pub struct NaiveDateTime {
     date: NaiveDate,
diff --git a/src/naive/isoweek.rs b/src/naive/isoweek.rs
index 8edf738ba0..deede94d65 100644
--- a/src/naive/isoweek.rs
+++ b/src/naive/isoweek.rs
@@ -18,6 +18,10 @@ use rkyv::{Archive, Deserialize, Serialize};
 /// via the [`Datelike::iso_week`](../trait.Datelike.html#tymethod.iso_week) method.
 #[derive(PartialEq, Eq, PartialOrd, Ord, Copy, Clone, Hash)]
 #[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
+#[cfg_attr(
+    feature = "rkyv",
+    archive_attr(derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug, Hash))
+)]
 pub struct IsoWeek {
     // note that this allows for larger year range than `NaiveDate`.
     // this is crucial because we have an edge case for the first and last week supported,
diff --git a/src/naive/time/mod.rs b/src/naive/time/mod.rs
index 43e614bab0..9bd4a6d5a4 100644
--- a/src/naive/time/mod.rs
+++ b/src/naive/time/mod.rs
@@ -193,6 +193,10 @@ mod tests;
 /// **there is absolutely no guarantee that the leap second read has actually happened**.
 #[derive(PartialEq, Eq, Hash, PartialOrd, Ord, Copy, Clone)]
 #[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
+#[cfg_attr(
+    feature = "rkyv",
+    archive_attr(derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug, Hash))
+)]
 pub struct NaiveTime {
     secs: u32,
     frac: u32,
diff --git a/src/offset/fixed.rs b/src/offset/fixed.rs
index 53e734cc16..23acd7b0d8 100644
--- a/src/offset/fixed.rs
+++ b/src/offset/fixed.rs
@@ -24,6 +24,7 @@ use crate::{DateTime, ParseError, Timelike};
 /// [`west_opt`](#method.west_opt) methods for examples.
 #[derive(PartialEq, Eq, Hash, Copy, Clone)]
 #[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
+#[cfg_attr(feature = "rkyv", archive_attr(derive(Clone, Copy, PartialEq, Eq, Hash, Debug)))]
 pub struct FixedOffset {
     local_minus_utc: i32,
 }
diff --git a/src/offset/local/mod.rs b/src/offset/local/mod.rs
index 557f8db03e..ffd2844d55 100644
--- a/src/offset/local/mod.rs
+++ b/src/offset/local/mod.rs
@@ -105,6 +105,7 @@ mod tz_info;
 /// ```
 #[derive(Copy, Clone, Debug)]
 #[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
+#[cfg_attr(feature = "rkyv", archive_attr(derive(Clone, Copy, Debug)))]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
 pub struct Local;
 
diff --git a/src/offset/utc.rs b/src/offset/utc.rs
index d27f7877e1..f50532e0d2 100644
--- a/src/offset/utc.rs
+++ b/src/offset/utc.rs
@@ -42,6 +42,7 @@ use crate::{Date, DateTime};
 /// ```
 #[derive(Copy, Clone, PartialEq, Eq, Hash)]
 #[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
+#[cfg_attr(feature = "rkyv", archive_attr(derive(Clone, Copy, PartialEq, Eq, Debug, Hash)))]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
 pub struct Utc;
 
diff --git a/src/weekday.rs b/src/weekday.rs
index a7abd94153..b399748ebf 100644
--- a/src/weekday.rs
+++ b/src/weekday.rs
@@ -32,6 +32,7 @@ use crate::OutOfRange;
 #[derive(PartialEq, Eq, Copy, Clone, Debug, Hash)]
 #[cfg_attr(feature = "rustc-serialize", derive(RustcEncodable, RustcDecodable))]
 #[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
+#[cfg_attr(feature = "rkyv", archive_attr(derive(Clone, Copy, PartialEq, Eq, Debug, Hash)))]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
 pub enum Weekday {
     /// Monday.