from tkinter import *
from datetime import datetime
root = Tk()
root.title("Dia de Hoje")
root.geometry("300x90")
root.resizable(0,0)
root.configure(bg="#c9e1e6")
titulo =Label(text="Dia de Hoje ",
              font=("Arial",12,"bold"),bg="#c9e1e6",fg="#b9770e")
titulo.place(relx=0.35,rely=0.1)
# Dia actual
a = datetime.today().strftime('%d-%m-%Y')
texto = Label(text=a,font=("Arial",13,"bold"),bg="#c9e1e6",fg="#3f00ff")
texto.place(relx=0.35,rely=0.45)
root.mainloop()

# Outra versão

from tkinter import *
from time import *
root = Tk()
root.title("Relógio")
root.configure(bg="#cfe2f3")
root.geometry("400x200")
root.resizable(0,0)
def app():
    tempo = strftime("%I:%M:%S %p")
    v_data = strftime("%A")
    dia_semana.configure(text=v_data)
    v_dia = strftime("%B %d, %Y")
    relogio.configure(text=tempo)
    dia.configure(text=v_dia)
    relogio.after(1000,app)
relogio = Label(font=("Arial","45","bold"),fg="#3ca915",bg="#cfe2f3")
relogio.place(relx=0.05,rely=0.1)
dia_semana = Label(font=("Arial","15","bold"),fg="#3ca915",bg="#cfe2f3")
dia_semana.place(relx=0.4,rely=0.55)

dia = Label(font=("Arial","11","bold"),fg="#3ca915",bg="#cfe2f3")
dia.place(relx=0.35,rely=0.7)
app()
root.mainloop()