diff --git a/src/items/weekday.rs b/src/items/weekday.rs
index cc9d0e2..3bf9338 100644
--- a/src/items/weekday.rs
+++ b/src/items/weekday.rs
@@ -41,7 +41,7 @@ pub(crate) enum Day {
 }
 
 #[derive(PartialEq, Eq, Debug)]
-pub struct Weekday {
+pub(crate) struct Weekday {
     pub(crate) offset: i32,
     pub(crate) day: Day,
 }
@@ -60,6 +60,20 @@ impl From<Day> for chrono::Weekday {
     }
 }
 
+impl From<Day> for jiff::civil::Weekday {
+    fn from(value: Day) -> Self {
+        match value {
+            Day::Monday => jiff::civil::Weekday::Monday,
+            Day::Tuesday => jiff::civil::Weekday::Tuesday,
+            Day::Wednesday => jiff::civil::Weekday::Wednesday,
+            Day::Thursday => jiff::civil::Weekday::Thursday,
+            Day::Friday => jiff::civil::Weekday::Friday,
+            Day::Saturday => jiff::civil::Weekday::Saturday,
+            Day::Sunday => jiff::civil::Weekday::Sunday,
+        }
+    }
+}
+
 /// Parse a weekday item.
 pub(super) fn parse(input: &mut &str) -> ModalResult<Weekday> {
     seq!(Weekday {