diff --git a/src/items/weekday.rs b/src/items/weekday.rs
index 77d0cc9..1efe52f 100644
--- a/src/items/weekday.rs
+++ b/src/items/weekday.rs
@@ -70,7 +70,7 @@ pub(super) fn parse(input: &mut &str) -> ModalResult<Weekday> {
 }
 
 fn day(input: &mut &str) -> ModalResult<Day> {
-    s(alpha1)
+    s((alpha1, opt('.')).take())
         .verify_map(|s: &str| {
             Some(match s {
                 "monday" | "mon" | "mon." => Day::Monday,
diff --git a/src/lib.rs b/src/lib.rs
index 86d8ca3..96a3962 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -535,6 +535,35 @@ mod tests {
                 "2023-04-24 00:00:00 000000000"
             );
         }
+
+        #[test]
+        fn test_weekday_abbreviation_with_period() {
+            let date = "2023-02-28 10:12:03"
+                .parse::<DateTime>()
+                .unwrap()
+                .to_zoned(TimeZone::system())
+                .unwrap();
+
+            for (weekday, expected) in [
+                ("mon.", "2023-03-06 00:00:00 000000000"),
+                ("tue.", "2023-02-28 00:00:00 000000000"),
+                ("wed.", "2023-03-01 00:00:00 000000000"),
+                ("thu.", "2023-03-02 00:00:00 000000000"),
+                ("fri.", "2023-03-03 00:00:00 000000000"),
+                ("sat.", "2023-03-04 00:00:00 000000000"),
+                ("sun.", "2023-03-05 00:00:00 000000000"),
+            ] {
+                assert_eq!(get_formatted_date(&date, weekday), expected, "{weekday}");
+            }
+
+            for (input, expected) in [
+                ("wed., 2024-01-03", "2024-01-03 00:00:00"),
+                ("mon., 2024-01-03", "2024-01-03 00:00:00"),
+            ] {
+                let actual = crate::parse_datetime(input).unwrap().expect_in_range();
+                assert_eq!(actual.strftime("%F %T").to_string(), expected, "{input}");
+            }
+        }
     }
 
     #[cfg(test)]