diff --git a/src/Bar.js b/src/Bar.js
index 83a9f60..8dbd54e 100644
--- a/src/Bar.js
+++ b/src/Bar.js
@@ -423,6 +423,12 @@ export default function Bar(gt, task) {
 		const new_start_date = gt.gantt_start.clone().add(x_in_units * gt.config.step, 'hours');
 		const width_in_units = bar.getWidth() / gt.config.column_width;
 		const new_end_date = new_start_date.clone().add(width_in_units * gt.config.step, 'hours');
+		// lets say duration is 2 days
+		// start_date = May 24 00:00:00
+		// end_date = May 24 + 2 days = May 26 (incorrect)
+		// so subtract 1 second so that
+		// end_date = May 25 23:59:59
+		new_end_date.add('-1', 'seconds');
 		return { new_start_date, new_end_date };
 	}