fix(manufacturing): keep MRP chart dates distinct

(cherry picked from commit 5ad085887d)

erpnext/manufacturing/report/material_requirements_planning_report/material_requirements_planning_report.py

@@ -277,7 +277,7 @@ class MaterialRequirementsPlanningReport:
 			if getdate(row.delivery_date) < getdate(today()):
 				continue
 
-			delivery_date = formatdate(row.delivery_date, "dd MMM")
+			delivery_date = getdate(row.delivery_date)
 			if delivery_date not in chart_data:
 				chart_data[delivery_date] = frappe._dict(
 					{
@@ -294,6 +294,7 @@ class MaterialRequirementsPlanningReport:
 
 		demand_data = []
 		supply_data = []
+		delivery_dates = list(chart_data)
 		for row in chart_data:
 			value = chart_data[row]
 
@@ -302,7 +303,7 @@ class MaterialRequirementsPlanningReport:
 
 		return {
 			"data": {
-				"labels": list(chart_data.keys()),
+				"labels": self.get_detailed_chart_labels(delivery_dates),
 				"datasets": [
 					{
 						"name": _("Demand"),
@@ -320,6 +321,10 @@ class MaterialRequirementsPlanningReport:
 			"title": _("Demand vs Supply"),
 		}
 
+	def get_detailed_chart_labels(self, delivery_dates):
+		date_format = "dd MMM yyyy" if len({date.year for date in delivery_dates}) > 1 else "dd MMM"
+		return [formatdate(date, date_format) for date in delivery_dates]
+
 	def get_bucket_view_chart_data(self, data):
 		chart_data = frappe._dict({})
 		labels = []

erpnext/manufacturing/report/material_requirements_planning_report/test_material_requirements_planning_report.py

@@ -2,6 +2,7 @@
 # See license.txt
 
 import frappe
+from frappe.tests.classes.context_managers import freeze_time
 from frappe.utils import add_days, flt, formatdate, today
 
 from erpnext.accounts.doctype.tax_rule.test_tax_rule import make_tax_rule
@@ -23,6 +24,7 @@ TAX_TEMPLATE = "_Test Purchase Taxes and Charges Template - _TC"
 
 class TestMaterialRequirementsPlanningReport(ERPNextTestSuite):
 	def test_detailed_chart_includes_full_date_range(self):
+		with freeze_time("2026-08-12"):
 			start_date = add_days(today(), 1)
 			delivery_dates = [add_days(start_date, offset) for offset in range(12)]
 			rows = [make_chart_row(delivery_date) for delivery_date in delivery_dates]
@@ -36,7 +38,24 @@ class TestMaterialRequirementsPlanningReport(ERPNextTestSuite):
 			)
 			self.assertEqual(chart["data"]["datasets"][0]["values"], [1] * 11 + [3])
 
+	def test_detailed_chart_distinguishes_delivery_dates_across_years(self):
+		with freeze_time("2026-08-12"):
+			delivery_dates = ["2026-08-15", "2027-08-15"]
+			rows = [
+				make_chart_row(delivery_dates[0]),
+				make_chart_row(delivery_dates[1], planned_qty=2),
+			]
+
+			chart = MaterialRequirementsPlanningReport(frappe._dict()).get_detailed_view_chart_data(rows)
+
+			self.assertEqual(
+				chart["data"]["labels"],
+				[formatdate(delivery_date, "dd MMM yyyy") for delivery_date in delivery_dates],
+			)
+			self.assertEqual(chart["data"]["datasets"][0]["values"], [1, 2])
+
 	def test_detailed_chart_excludes_past_and_empty_delivery_dates(self):
+		with freeze_time("2026-08-12"):
 			delivery_dates = [today(), add_days(today(), 1)]
 			rows = [
 				make_chart_row(add_days(today(), -1)),