1 files changed, 7 insertions, 1 deletions
diff --git a/src/doc/rustc-dev-guide/ci/date-check/src/main.rs b/src/doc/rustc-dev-guide/ci/date-check/src/main.rs
index d78b430b5c7..bbea2bf38d9 100644
--- a/src/doc/rustc-dev-guide/ci/date-check/src/main.rs
+++ b/src/doc/rustc-dev-guide/ci/date-check/src/main.rs
@@ -39,7 +39,7 @@ fn make_date_regex() -> Regex {
     Regex::new(
         r"(?x) # insignificant whitespace mode
         <!--\s*
-        date:\s*
+        [dD]ate:\s*
         (?P<y>\d{4}) # year
         -
         (?P<m>\d{2}) # month
@@ -187,6 +187,12 @@ mod tests {
     }
 
     #[test]
+    fn test_date_regex_capitalized() {
+        let regex = make_date_regex();
+        assert!(regex.is_match("foo <!-- Date: 2021-08 --> bar"));
+    }
+
+    #[test]
     fn test_collect_dates_from_file() {
         let text = "Test1\n<!-- date: 2021-01 -->\nTest2\nFoo<!-- date: 2021-02 \
                     -->\nTest3\nTest4\nFoo<!-- date: 2021-03 -->Bar\n<!-- date: 2021-04 \