Educational using optionmenus and listbox with tkinter

from tkinter import *
"""
The containers below hold our data for the dates. The more advanced version would use a calendar module or some other
means of ensuring data being put into the option menus is correct. For sake of example, I've just filled the lists with
fake dates.
"""
years = ['2019', '2020']
months = ['Jan', 'Mar', 'Apr']
days = ['1', '2', '3']

hours = [i for i in range(1, 13)]
minutes = [i for i in range(1, 61)]
ampm = ['AM', 'PM']



root = Tk()  # Our tkinter base

root.title("Date selector")
root.geometry('300x500')

year_var = StringVar()  # Variables for our optionmenus
month_var = StringVar()
day_var = StringVar()
hour_var = StringVar()
minute_var = StringVar()
am_pm_var = StringVar()


year_optionmenu = OptionMenu(root, year_var, *years)  # Optionmenus for each variable
month_optionmenu = OptionMenu(root, month_var, *months)
day_optionmenu = OptionMenu(root, day_var, *days)

hour_optionmenu = OptionMenu(root, hour_var, *hours)
minute_optionmenu = OptionMenu(root, minute_var, *minutes)
am_pm_optionmenu = OptionMenu(root,  am_pm_var, *ampm)

button_select = Button(root, text='SELECT')

my_list_box = Listbox(root)  # An example of a listbox and how data is added.
example = ['This', 'is', 'a', 'list']
for item in example:
    my_list_box.insert(END, item)

year_optionmenu.grid(column=0, row=0)
month_optionmenu.grid(column=1, row=0)
day_optionmenu.grid(column=2, row=0)

hour_optionmenu.grid(column=3, row=0)
minute_optionmenu.grid(column=4, row=0)
am_pm_optionmenu.grid(column=5, row=0)
button_select.grid(column=0, row=1, columnspan=5)
my_list_box.grid(column=0, row=2, columnspan=5)


root.mainloop()  # Mainloop