Crear un formulario que contenga dos cajas texto, una numerica y la otra en formato de fecha

from tkinter import *
from tkinter.ttk import *
from datetime import date

root = Tk()
root.title("Formulario")

name = StringVar()
birthday = StringVar()

name_label = Label(root, text="Name")
name_label.grid(row=0, column=0)
name_entry = Entry(root, textvariable=name)
name_entry.grid(row=0, column=1)

birthday_label = Label(root, text="Birthday")
birthday_label.grid(row=1, column=0)
birthday_entry = Entry(root, textvariable=birthday)
birthday_entry.grid(row=1, column=1)

def calculate_age():
  today = date.today()
  born = date.fromisoformat(birthday.get())
  age = today.year - born.year - ((today.month, today.day) < (born.month, born.day))
  messagebox.showinfo("Age Calculator", "{} you