from calendar import monthrange
from tkinter import Label,Tk
def cal(year,month):
  root=Tk()
  daysofweek=['Mon','Tue','Wed','Thu','Fri','Sat','Sun']
  for i in range(7):
      label=Label(root,text=daysofweek[i])
      label.grid(row=0,column=i)
  weekdays,nodays=monthrange(year,month)
  week=1
  for i in range(1,nodays+1):
      label=Label(root,text=str(i))
      label.grid(row=week,column=weekdays)
      weekdays+=1
      if weekdays>6:
          weekdays=0
          week+=1
  root.mainloop

cal(2017,2)