Building a Digital Clock with Python

Design a simple python application using the Tkinter package

In this post, I will show you how to build and design your digital clock window using python. This is a simple project to get started with Tkinter, which is a built-in package that comes with Python. Tkinter is basically a graphical user interface package. It has great features that can be used to create simple applications. And today we will use it to create our digital clock.

The great part of building your own digital clock is you can customize it as you wish. From text font to background color, all the features are available to be customized. If you are ready, let get started!

Table of Contents

  • Python
  • Import Libraries
  • Application Window
  • Digital Clock Function
  • Run the Application


Python is a general-purpose programming language that is becoming ever more popular for analyzing data. Python also lets you work quickly and integrate systems more effectively. Companies from all around the world are utilizing Python to gather bits of knowledge from their data. The official Python page if you want to learn more.

Import Libraries

We will use two libraries in this project. And both of them come with Python, which means we don’t have to install them. These kind of libraries is called Python built-in packages.

The main package we will use is Tkinter. You can learn more about Tkinter from here, the official documentation page.

So for this step, all we need to do is to import them to our program:

from tkinter import Label, Tk
import time

Application Window

In this step, we will first define the window panel using Tkinter package. And after that, we will define the text design that we want to use for the digital clock.

Define the Window

As mentioned earlier, we will use Tkinter package. Tkinter is can be defined as Tk. And after defining it, we will customize it.

app_window = Tk()
app_window.title("My Digital Time")
  • Defining the Tkinter function
  • Giving a title to our application window
  • Defining the size of our video, for example in my case, it’s 350pixels width to 150pixels height
  • The window is not resizable, because the text values are not responsive design. And we don’t want our design to look weird when the window size is changed.

Perfect, our basic application window is ready! Now, let’s work on the design.

The Label Design

The cool step of the program is this one. Because you can put your own preferences into the design. This step will make your work different from others. If you love designing things, it’s time to show off your skills. 🙂

There are four elements that we will customize:

  • The font of the digital numbers
  • The background color of our digital clock
  • The color of the digital numbers, make sure it is not the same color as your background 😉
  • The border width of the text

Here are the values that I used for my design:

text_font= ("Boulder", 68, 'bold')
background = "#f2e750"
foreground= "#363529"
border_width = 25

For colors, feel free to use RGB values or hex values. In my case, I used the hex values of the colors. I use google’s color picker that is available on the browser. Just search “Color picker” on google search. And you will see it.

Now, let’s combine the elements and define our label. Label function is the text that will show our time.

label = Label(app_window, font=text_font, bg=background, fg=foreground, bd=border_width)
label.grid(row=0, column=1)

If you want to learn more about the attributes of the Label function, here is a nice page I found.

Digital Clock Function

If we are working on an application project, functions are the best way to make things work. Functions are also great because they make the program more structured and easier to understand. Alright, let’s define our digital clock function then:

def digital_clock():
   time_live = time.strftime("%H:%M:%S")
   label.after(200, digital_clock)
  • In the first line, we are getting real-time using the time package. And we are also defining the format that we want it to be. Since we are designing a digital clock, “hour, minutes, seconds” will be a nice format to go with.
  • In the second line, we are just assigning the real-time to the label method. This way the digital time will be updated.
  • And lastly, we are calling the function again so that the digital clock is showing the live time. This way every 200 milliseconds the time is getting updated. In programming, this is called a recursion loop. Calling the same function, inside the function. Feels like inceptions, isn’t that cool?

Run the Application

Great! You made it until this step, which is the final step of our application project. As you know functions will not run unless you call them. To trigger the application, we will call the function. Let’s run the application:



photo by author

Well done! You have created a simple digital clock application using only python. Python is a very powerful language and things we can create with python is limitless. It is all about thinking about an idea and making it work. Hoping that you enjoyed reading my article. Working on hands-on programming projects like this one is the best way to sharpen your coding skills.

I am so glad if you learned something new today. Feel free to contact me if you have any questions while implementing the code. 😊

Follow my blog and youtube to stay inspired. Thank you,

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: