diff --git a/copyrat.tmux b/copyrat.tmux
index 134ee92..b07d1be 100755
--- a/copyrat.tmux
+++ b/copyrat.tmux
@@ -81,8 +81,10 @@ setup_pattern_binding "p" "--pattern-name path"
 setup_pattern_binding "u" "--pattern-name url"
 # prefix + t + m searches for Markdown URLs [...](matched.url)
 setup_pattern_binding "m" "--pattern-name markdown-url"
-# prefix + t + h searches for SHA1/2 (hashes)
+# prefix + t + h searches for SHA1/2 short or long hashes
 setup_pattern_binding "h" "--pattern-name sha"
+# prefix + t + d searches for dates or datetimes
+setup_pattern_binding "d" "--pattern-name datetime"
 # prefix + t + e searches for email addresses (see https://www.regular-expressions.info/email.html)
 setup_pattern_binding "e" "--pattern-name email"
 # prefix + t + D searches for docker shas
@@ -93,7 +95,7 @@ setup_pattern_binding "c" "--pattern-name hexcolor"
 setup_pattern_binding "U" "--pattern-name uuid"
 # prefix + t + v searches for version numbers
 setup_pattern_binding "v" "--pattern-name version"
-# prefix + t + d searches for any string of 4+ digits
+# prefix + t + G searches for any string of 4+ digits
 setup_pattern_binding "G" "--pattern-name digits"
 # prefix + t + m searches for hex numbers: 0xbedead
 setup_pattern_binding "P" "--pattern-name pointer-address"
diff --git a/src/textbuf/mod.rs b/src/textbuf/mod.rs
index 60c9031..25a0295 100644
--- a/src/textbuf/mod.rs
+++ b/src/textbuf/mod.rs
@@ -547,6 +547,32 @@ mod tests {
         assert_eq!(spans.get(0).unwrap().text, "src/main.rs");
     }
 
+    #[test]
+    fn match_datetime() {
+        let buffer = "12 days ago = 2021-03-04T12:23:34 text";
+        let lines = buffer.split('\n').collect::<Vec<_>>();
+        let use_all_patterns = true;
+        let named_pat = vec![];
+        let custom = vec![];
+        let alphabet = Alphabet("abcd".to_string());
+        let reverse = false;
+        let unique_hint = false;
+        let spans = Model::new(
+            &lines,
+            &alphabet,
+            use_all_patterns,
+            &named_pat,
+            &custom,
+            reverse,
+            unique_hint,
+        )
+        .spans;
+
+        assert_eq!(spans.len(), 1);
+        assert_eq!(spans.get(0).unwrap().pattern, "datetime");
+        assert_eq!(spans.get(0).unwrap().text, "2021-03-04T12:23:34");
+    }
+
     #[test]
     fn priority_between_regexes() {
         let buffer = "Lorem [link](http://foo.bar) ipsum CUSTOM-52463 lorem ISSUE-123 lorem\nLorem /var/fd70b569/9999.log 52463 lorem\n Lorem 973113 lorem 123e4567-e89b-12d3-a456-426655440000 lorem 8888 lorem\n  https://crates.io/23456/fd70b569 lorem";
diff --git a/src/textbuf/regexes.rs b/src/textbuf/regexes.rs
index 5f57914..31603ea 100644
--- a/src/textbuf/regexes.rs
+++ b/src/textbuf/regexes.rs
@@ -7,7 +7,7 @@ pub(super) const EXCLUDE_PATTERNS: [(&str, &str); 1] =
 ///
 /// The email address was obtained at https://www.regular-expressions.info/email.html.
 /// Others were obtained from Ferran Basora.
-pub(super) const PATTERNS: [(&str, &str); 16] = [
+pub(super) const PATTERNS: [(&str, &str); 17] = [
     ("markdown-url", r"\[[^]]*\]\(([^)]+)\)"),
     (
         "url",
@@ -32,6 +32,10 @@ pub(super) const PATTERNS: [(&str, &str); 16] = [
     ("ipv4", r"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}"),
     ("ipv6", r"[A-f0-9:]+:+[A-f0-9:]+[%\w\d]+"),
     ("pointer-address", r"0x[0-9a-fA-F]+"),
+    (
+        "datetime",
+        r"(\d{4}-?\d{2}-?\d{2}([ T]\d{2}:\d{2}:\d{2}(\.\d{3,9})?)?)",
+    ),
     ("digits", r"[0-9]{4,}"),
 ];