diff --git a/crates/core/src/model/scalar/datetime.rs b/crates/core/src/model/scalar/datetime.rs
index 17540d69f..b86d00070 100644
--- a/crates/core/src/model/scalar/datetime.rs
+++ b/crates/core/src/model/scalar/datetime.rs
@@ -237,6 +237,8 @@ fn parse_date_time(s: &str) -> Option<DateTimeImpl> {
         None
     } else if let "now" | "today" = s.to_lowercase().trim() {
         Some(DateTimeImpl::now_utc())
+    } else if s.parse::<i64>().is_ok() {
+        DateTimeImpl::parse(s, format_description!("[unix_timestamp]")).ok()
     } else {
         let offset_re = Regex::new(r"[+-][01][0-9]{3}$").unwrap();
 
@@ -375,6 +377,21 @@ mod test {
         assert!(actual.unwrap().unix_timestamp() == 1455616800);
     }
 
+    #[test]
+    fn parse_date_time_unix_timestamp_format() {
+        let input = "0"; // epoch
+        let actual = parse_date_time(input);
+        assert!(actual.unwrap().unix_timestamp() == 0);
+
+        let input = "1455616800"; // positive
+        let actual = parse_date_time(input);
+        assert!(actual.unwrap().unix_timestamp() == 1455616800);
+
+        let input = "-1455616800"; // negative
+        let actual = parse_date_time(input);
+        assert!(actual.unwrap().unix_timestamp() == -1455616800);
+    }
+
     #[test]
     fn parse_date_time_to_string() {
         let date = DateTime::now();