title: Python Tkinter ttk calendar
body: <p>I am trying to create a drop down calendar for a date entry.
  Below is a portion of my code:</p>
  
  <p>The drop down portion of it dosen't work and I can't seem to find the syntax for <code>DateEntry()</code> of ttk calendar anywhere to include the calendar widget option!</p>
  
  <pre><code>#creating the frame 
  from tkinter import *
  from tkcalendar import *
  
  root = Tk()
  
  f1=Frame(root,width=1500,height=100,relief=SUNKEN,bd=4,bg='light steel blue')
  f1.pack(side=TOP)
  f2=Frame(root,width=1500,height=550,relief=SUNKEN,bd=4,bg='white')
  f2.pack()
  f3=Frame(root,width=1600,height=100,relief=SUNKEN,bd=4,bg='white')
  f3.pack(side=BOTTOM)
  
  
  #Creating the date column
  l4=Label(f2,text='DATE',font=('tahoma',20,'bold'),fg='black',anchor='w')
  l4.grid(row=0,column=3)
  
  cal=DateEntry(f2,dateformat=3,width=12, background='darkblue',
                      foreground='white', borderwidth=4,Calendar =2018)
  cal.grid(row=1,column=3,sticky='nsew')
  </code></pre>
  
  <p>I want it to look like this:
  <a href="https://i.stack.imgur.com/eNLb9.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eNLb9.png" alt="screenshot"></a></p>