[Python] How do I get the Value of Tkcalendar/Date Entry

hi I am building a GUI where it should be possible to insert your name and your brthday that get´s stored in a sqllite3 database. I use the Tkcalendar module to let the person choose it´s birthday. My problem is I don´t know how to read out the Date. I hope somebody can help me!

import sqlite3
verbindung = sqlite3.connect("Datenbanken/geb3.db")
zeiger = verbindung.cursor()
zeiger.execute("""CREATE TABLE IF NOT EXISTS people3(vorname VARCHAR(20), nachname VARCHAR(30), geburtstag DATE );""")

from tkinter import *
from tkcalendar import Calendar, DateEntry

root = Tk()



def speichern():
zeiger.execute("""INSERT INTO people3 VALUES (?,?,?) """, (eingabefeldvorname.get(), eingabefeldnachname.get(), eingabefelddatum.get()))




Label(root, text = "vorname").pack()
eingabefeldvorname=StringVar()
eingabefeld = Entry(root, textvariable = eingabefeldvorname, bg ="red").pack()

Label(root, text = "nachname").pack()
eingabefeldnachname = StringVar()
eingabefeld = Entry(root, textvariable = eingabefeldnachname, bg ="green").pack()

Label(root, text = "Geburtsdatum")


eingabefelddatum= DateEntry(root, width = 20, textvariable = eingabefelddatum, bg ="yellow").pack()

konpf2 = Button(root, text = "speichern", command = speichern).pack()
root.mainloop()



zeiger.execute("SELECT * FROM people3")
inhalt = zeiger.fetchall()
print(inhalt)


def listeleeren():
zeiger.execute("DELETE FROM people3")

listeleeren()


verbindung.commit()
verbindung.close()```

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