import tkinter as tk

from datetime import datetime

root = tk.Tk()

def f_close(event):

    root.destroy()

frame = tk.Frame(root)

label = tk.Label(font=("Systems", 20))

root.title("デジタル時計")

button = tk.Button(frame, text = 'Close')

button.grid(row = 0, column = 10, padx = 5, sticky = 'e')

button.bind('<Button-1>', f_close)

canvas = tk.Canvas(frame, bg = '#000000', width = 800, height = 400)

canvas.grid(row = 1, columnspan = 11, rowspan = 1)

frame.pack()

canvas.create_text(400, 200, text = ' ', font = ('Black Ops One regular', 110),fill="SpringGreen", tags = 'mytext')

def get_time():

    now = datetime.now()

    day_of_the_week = ['月', '火', '水', '木', '金', '土', '日']

    label['text'] = f'{now.year:02}年{now.month:02}月{now.day:02}日({day_of_the_week[now.weekday()]})'

    root.after(1000, get_time)

label = tk.Label(font=("Black Ops One regular", 120), foreground="SpringGreen")

label.place(x=50, y=30)

def check_time():

    now = datetime.now()

    s = '{0:0>2d}:{1:0>2d}:{2:0>2d}'.format(now.hour, now.minute, now.second)

    canvas.itemconfig('mytext', text = s)

    root.after(100, check_time)

label.pack()

check_time()

root.mainloop()