I recently solved Problem 19 from Project Euler. Since I don't really enjoy date math, I decided to brute force it and use the `datetime`

module from the standard library.

```
from datetime import date
def next_first_of_month_in_20th():
"""Generator to list every first of the month during the 20th century."""
first = date(1901, 1, 1)
yield first
while first.year < 2001:
if first.month == 12:
first = first.replace(year=first.year + 1)
first = first.replace(month=1)
else:
first = first.replace(month=first.month + 1)
yield first
def main():
"""
Solve `Problem 19`_ from Project Euler.
.. _`Problem 19`: http://projecteuler.net/index.php?section=problems&id=19
"""
return len([first for first in next_first_of_month_in_20th() if first.weekday() == 6])
if __name__ == '__main__':
print main()
```

Back to flipping out...