The date by which a task or activity is expected to be finished.

समाप्ति की तिथि

English Usage: The project manager confirmed the date of completion as December 15th.

Hindi Usage: प्रोजेक्ट मैनेजर ने १५ दिसंबर को समाप्ति तिथि के रूप में पुष्टि की।