diff --git a/backend/parsers/windmill-parser-bash/src/lib.rs b/backend/parsers/windmill-parser-bash/src/lib.rs
index e153c51041..662ce1fb61 100644
--- a/backend/parsers/windmill-parser-bash/src/lib.rs
+++ b/backend/parsers/windmill-parser-bash/src/lib.rs
@@ -88,6 +88,7 @@ fn parse_powershell_file(code: &str) -> anyhow::Result<Option<Vec<Arg>>> {
                     "string" => Typ::Str(None),
                     "int" | "long" => Typ::Int,
                     "decimal" | "double" | "single" => Typ::Float,
+                    "datetime" | "DateTime" => Typ::Datetime,
                     _ => Typ::Str(None),
                 },
                 default: default.clone(),
diff --git a/backend/parsers/windmill-parser-wasm/tests/wasm.rs b/backend/parsers/windmill-parser-wasm/tests/wasm.rs
index 3c6fd4d291..191e64655a 100644
--- a/backend/parsers/windmill-parser-wasm/tests/wasm.rs
+++ b/backend/parsers/windmill-parser-wasm/tests/wasm.rs
@@ -2,6 +2,7 @@ use serde_json::json;
 use wasm_bindgen_test::wasm_bindgen_test;
 use windmill_parser::{Arg, MainArgSignature, ObjectProperty, Typ};
 use windmill_parser_ts::{parse_deno_signature, parse_expr_for_ids, parse_expr_for_imports};
+use windmill_parser_bash::{parse_powershell_sig};
 
 #[wasm_bindgen_test]
 fn test_parse_deno_sig() -> anyhow::Result<()> {
@@ -317,3 +318,79 @@ export type foo = number
 
     Ok(())
 }
+
+#[wasm_bindgen_test]
+fn test_parse_powershell_sig() -> anyhow::Result<()> {
+    let code = "
+param($test_none, [string]$test_string [int]$test_int, [decimal]$test_decimal, [double]$test_double, [single]$test_single, [datetime]$test_datetime_lower, [DateTime]$test_datetime_upper)
+
+Write-Output 'Testing...'
+";
+    assert_eq!(
+        parse_powershell_sig(code)?,
+        MainArgSignature {
+            star_args: false,
+            star_kwargs: false,
+            args: vec![
+                Arg {
+                    otyp: None,
+                    name: "test_none".to_string(),
+                    typ: Typ::Str(None),
+                    default: None,
+                    has_default: false
+                },
+                Arg {
+                    otyp: None,
+                    name: "test_string".to_string(),
+                    typ: Typ::Str(None),
+                    default: None,
+                    has_default: false
+                },
+                Arg {
+                    otyp: None,
+                    name: "test_int".to_string(),
+                    typ: Typ::Int,
+                    default: None,
+                    has_default: false
+                },
+                Arg {
+                    otyp: None,
+                    name: "test_decimal".to_string(),
+                    typ: Typ::Float,
+                    default: None,
+                    has_default: false
+                },
+                Arg {
+                    otyp: None,
+                    name: "test_double".to_string(),
+                    typ: Typ::Float,
+                    default: None,
+                    has_default: false
+                },
+                Arg {
+                    otyp: None,
+                    name: "test_single".to_string(),
+                    typ: Typ::Float,
+                    default: None,
+                    has_default: false
+                },
+                Arg {
+                    otyp: None,
+                    name: "test_datetime_lower".to_string(),
+                    typ: Typ::Datetime,
+                    default: None,
+                    has_default: false
+                },
+                Arg {
+                    otyp: None,
+                    name: "test_datetime_upper".to_string(),
+                    typ: Typ::Datetime,
+                    default: None,
+                    has_default: false
+                }
+            ]
+        }
+    );
+
+    Ok(())
+}