diff --git a/erpnext/accounts/utils.py b/erpnext/accounts/utils.py
index 183ae053545..0514aa455bc 100644
--- a/erpnext/accounts/utils.py
+++ b/erpnext/accounts/utils.py
@@ -1531,8 +1531,12 @@ def parse_naming_series_variable(doc, variable):
 	else:
 		data = {"YY": "%y", "YYYY": "%Y", "MM": "%m", "DD": "%d", "JJJ": "%j"}
 		date = (
-			getdate(doc.get("posting_date") or doc.get("transaction_date") or doc.get("posting_datetime"))
-			or now_datetime()
+			(
+				getdate(doc.get("posting_date") or doc.get("transaction_date") or doc.get("posting_datetime"))
+				or now_datetime()
+			)
+			if frappe.get_single_value("Global Defaults", "use_posting_datetime_for_naming_documents")
+			else now_datetime()
 		)
 		return date.strftime(data[variable]) if variable in data else determine_consecutive_week_number(date)
 
diff --git a/erpnext/setup/doctype/global_defaults/global_defaults.json b/erpnext/setup/doctype/global_defaults/global_defaults.json
index cb43c97ae4c..92bff6d4fbe 100644
--- a/erpnext/setup/doctype/global_defaults/global_defaults.json
+++ b/erpnext/setup/doctype/global_defaults/global_defaults.json
@@ -13,6 +13,7 @@
   "hide_currency_symbol",
   "disable_rounded_total",
   "disable_in_words",
+  "use_posting_datetime_for_naming_documents",
   "demo_company"
  ],
  "fields": [
@@ -80,6 +81,13 @@
    "label": "Demo Company",
    "options": "Company",
    "read_only": 1
+  },
+  {
+   "default": "0",
+   "description": "When checked, the system will use the posting datetime of the document for naming the document instead of the creation datetime of the document.",
+   "fieldname": "use_posting_datetime_for_naming_documents",
+   "fieldtype": "Check",
+   "label": "Use Posting Datetime for Naming Documents"
   }
  ],
  "grid_page_length": 50,
@@ -89,7 +97,7 @@
  "in_create": 1,
  "issingle": 1,
  "links": [],
- "modified": "2026-01-02 18:13:13.421866",
+ "modified": "2026-01-12 09:45:59.819161",
  "modified_by": "Administrator",
  "module": "Setup",
  "name": "Global Defaults",
diff --git a/erpnext/setup/doctype/global_defaults/global_defaults.py b/erpnext/setup/doctype/global_defaults/global_defaults.py
index 4b7f642747e..99174c9a0d1 100644
--- a/erpnext/setup/doctype/global_defaults/global_defaults.py
+++ b/erpnext/setup/doctype/global_defaults/global_defaults.py
@@ -39,6 +39,7 @@ class GlobalDefaults(Document):
 		disable_in_words: DF.Check
 		disable_rounded_total: DF.Check
 		hide_currency_symbol: DF.Literal["", "No", "Yes"]
+		use_posting_datetime_for_naming_documents: DF.Check
 	# end: auto-generated types
 
 	def on_update(self):