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# Just a mind gap here. Can someone please help me figure this out?

I'm having an issue remembering how to run the method in this function for the month day

birthdays.py
```import datetime

birthdays = [
datetime.datetime(2012, 4, 29),
datetime.datetime(2006, 8, 9),
datetime.datetime(1978, 5, 16),
datetime.datetime(1981, 8, 15),
datetime.datetime(2001, 7, 4),
datetime.datetime(1999, 12, 30)
]

today = datetime.datetime.today()

def is_over_13(dt):
# compare total days
delta = today - dt
return delta.days >= 4745

def date_string(dt):
return strftime.datetime(%B %d)
```

## 2 Answers

For the last task, you have to use map() and filter() which each take a function and an iterable to apply the function to. For map() and filter() the function argument is just the name of the function you want to apply.

birth_dates = list(map(date_string, filter(is_over_13, birthdays))) OR birth_dates_com = [date_string(j) for j in [i for i in birthdays if is_over_13(i)]]

What is the question here?