Hi,
This desktop App was created using Tkinter and DateTime modules of Python. Please feel free to contact me if you wish to clear your doubts or modification of the app.
Full Python code is given here in my website:
https://civilengineering-softstudies.com/2021/06/vedic-kundli-maha-dasha-antar-dasha-calculator-app-using-python-tkinter.html
