diff --git a/stubs/rfc3339-validator/METADATA.toml b/stubs/rfc3339-validator/METADATA.toml
new file mode 100644
index 000000000..f564e7971
--- /dev/null
+++ b/stubs/rfc3339-validator/METADATA.toml
@@ -0,0 +1,2 @@
+version = "0.1.*"
+upstream_repository = "https://github.com/naimetti/rfc3339-validator"
diff --git a/stubs/rfc3339-validator/rfc3339_validator.pyi b/stubs/rfc3339-validator/rfc3339_validator.pyi
new file mode 100644
index 000000000..71f545bf2
--- /dev/null
+++ b/stubs/rfc3339-validator/rfc3339_validator.pyi
@@ -0,0 +1,10 @@
+import re
+from typing import Final
+
+__version__: Final[str]
+__author__: Final[str]
+__email__: Final[str]
+RFC3339_REGEX_FLAGS: Final[int]
+RFC3339_REGEX: Final[re.Pattern[str]]
+
+def validate_rfc3339(date_string: str) -> bool: ...