Aquí está mi código de Python. ¿Podría alguien mostrarme qué le pasa?

while 1:
date=input("Example: March 21 | What is the date? ")
if date=="June 21":
    sd="23.5° North Latitude"
if date=="March 21" | date=="September 21":
    sd="0° Latitude"
if date=="December 21":
    sd="23.5° South Latitude"
if sd:
    print sd

Y esto es lo que sucede:

>>> 
Example: March 21 | What is the date? 
Traceback (most recent call last):
  File "C:\Users\Daniel\Desktop\Solar Declination Calculater.py", line 2, in <module>
    date=input("Example: March 21 | What is the date? ")
  File "<string>", line 0

   ^
SyntaxError: unexpected EOF while parsing
>>>