Python unexpected EOF while parsing

Here's my python code. Could someone show me what's wrong with it.

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

And Here's what happens:

>>> 
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
>>>