getpelican/pelican — pull request #1533 by kernc (2014-11-17 06:00:19+00:00)
Title: Replace underscores in dates with spaces before parsing

This allows for parsing date **and time** from the filename
```
FILENAME_METADATA = '(?P\d{4}-\d{2}-\d{2}(_\d{2}:\d{2})?)_(?P.*)'
```
The format version with `_` is somewhat nicer and more readable than the one with a `T`.
It's an edgy use case but the drawbacks are few, if any.