From b1e5821453fd58d01f3233a0236be14a4e70f04f Mon Sep 17 00:00:00 2001
From: vansh2408 <vanshnandwani13@gmail.com>
Date: Mon, 27 Oct 2025 22:01:51 +0530
Subject: [PATCH] Include first and last date of each calendar year in
 getChartDateMap()

---
 .../calculator/portfolio-calculator.ts          | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/apps/api/src/app/portfolio/calculator/portfolio-calculator.ts b/apps/api/src/app/portfolio/calculator/portfolio-calculator.ts
index 10e5c15cb..3f9af1569 100644
--- a/apps/api/src/app/portfolio/calculator/portfolio-calculator.ts
+++ b/apps/api/src/app/portfolio/calculator/portfolio-calculator.ts
@@ -889,6 +889,23 @@ export abstract class PortfolioCalculator {
       }
     }
 
+    const startYear = startDate.getFullYear();
+    const endYear = endDate.getFullYear();
+
+    for (let year = startYear; year <= endYear; year++) {
+      const firstDay = new Date(year, 0, 1);  // January 1st
+      const lastDay = new Date(year, 11, 31); // December 31st
+
+      // Add only if they lie within the selected range
+      if (!isBefore(firstDay, startDate) && !isAfter(firstDay, endDate)) {
+        chartDateMap[format(firstDay, DATE_FORMAT)] = true;
+      }
+
+      if (!isBefore(lastDay, startDate) && !isAfter(lastDay, endDate)) {
+        chartDateMap[format(lastDay, DATE_FORMAT)] = true;
+      }
+    }
+
     return chartDateMap;
   }