Python formatting for markdown

README.md

@@ -6,7 +6,7 @@ The goal of named dates is to provide a simple API to keep track of special date
 
 ### Usage
 Need to recognize the 4th Thursday in November?
-```
+```python
 register_named_date("Thanksgiving Day", 11, 3, nth=4,
                     aliases=["Thanksgiving", "Turkey Day"])
 ...
@@ -15,12 +15,12 @@ if is_named_date(my_date, "Thanksgiving"):
 ```
 
 How about a date based on the end of the month? Say, the last Monday in May?
-```
+```python
 register_named_date("Memorial Day", 5, 0, nth=1, from_end=True)
 ```
 
 Something more complex? Define a custom function.
-```
+```python
 def is_good_friday(date):
     # Defaults to western Easter.
     return date == easter(date.year) - datetime.timedelta(days=2)
@@ -29,7 +29,7 @@ register_named_date("Good Friday", custom_func=is_good_friday)
 ```
 
 You can even group important dates into sets, find out which dates are in a set, and find out whether a date is in a set.
-```
+```python
 make_named_date_set("MyFavoriteHolidays", ["Thanksgiving",
                                            "Christmas",
                                            "New Years"])