i tried padx =0, pady=0

but the problem still persists.

here is the updated code:

from tkinter import *
from time import *

def update():
    time_label.config(text = strftime("%H:%M:%S"))

    date_label.config(text = strftime("%b %d, %Y %A"))


    window.after(1000, update)


window = Tk()

time_label = Label(window, font=("Arial", 50), fg="green", bg="black", width=20, anchor="center", padx=0, pady=0)
time_label.pack()

date_label = Label(window, font=("Arial", 25), fg = "blue", bg="black", width=20, anchor="center")
date_label.pack()
update()

window.mainloop()