[Tkinter] Tkinter won't start

[uriel]

Also i want to ask about other issue: Did i make a mistake in the code with reading the contents of the file or again with dispaying the lines of the file?

from tkinter import Tk, Canvas
from datetime import date, datetime


def get_events():
    list_events = []
    with open('events.txt', encoding='utf-8') as file:
        for line in file:
            line = line.rstrip('\n')
            current_event = line.split(',')
            event_date = datetime.strptime(current_event[1], '%d/%m/%Y').date()
            current_event[1] = event_date
            list_events.append(current_event)
    return list_events


def days_between_dates(date1, date2):
    time_between = str(date1 - date2)
    number_of_days = time_between.split(' ')
    return number_of_days[0]


root = Tk()
c = Canvas(root, width=800, height=800, bg='black')
c.pack()
c.create_text(100, 50, anchor='w', fill='orange', font='Arial 28 bold underline', text='Календарь ожидания')
root.mainloop()

events = get_events()
today = date.today()

vertical_space = 100

for event in events:
    event_name = event[0]
    days_until = days_between_dates(event[1], today)
    display = '%s через %s дн.' % (event_name, days_until)
    c.create_text(100, 100, anchor='w', fill='light blue', font='Arial 28 bold', text=display)

vertical_space = vertical_space + 30