diff --git a/sponsors/pdf.py b/sponsors/pdf.py
index f1b80d911..9855beee3 100644
--- a/sponsors/pdf.py
+++ b/sponsors/pdf.py
@@ -34,7 +34,9 @@ def _contract_context(contract, **context):
         "legal_clauses": _clean_split(contract.legal_clauses.raw),
         "renewal": contract.sponsorship.renewal,
     })
-    context["previous_effective"] = contract.sponsorship.previous_effective_date if contract.sponsorship.previous_effective_date else "UNKNOWN"
+    previous_effective = contract.sponsorship.previous_effective_date
+    context["previous_effective"] = previous_effective if previous_effective else "UNKNOWN"
+    context["previous_effective_english_suffix"] = format(previous_effective, "S") if previous_effective else None
     return context
 
 
diff --git a/sponsors/tests/test_pdf.py b/sponsors/tests/test_pdf.py
index 2116b7c21..e4d140cf2 100644
--- a/sponsors/tests/test_pdf.py
+++ b/sponsors/tests/test_pdf.py
@@ -30,6 +30,7 @@ def setUp(self):
             "legal_clauses": [],
             "renewal": None,
             "previous_effective": "UNKNOWN",
+            "previous_effective_english_suffix": None,
         }
         self.template = "sponsors/admin/preview-contract.html"
 
@@ -90,6 +91,7 @@ def test_render_response_with_docx_attachment__renewal(self, MockDocxTemplate):
             "legal_clauses": [],
             "renewal": True,
             "previous_effective": "UNKNOWN",
+            "previous_effective_english_suffix": None,
         }
         renewal_template = "sponsors/admin/preview-contract.html"