When I rewrote this website using Pelican, I wanted to use three letter month names (i.e. jan, feb, mar) in the URLs. In Pelican you can customize the URL of an article by setting the ARTICLE_URL and ARTICLE_SAVE_AS variables, like this:

ARTICLE_URL = '/{date:%Y}/{date:%b}/{date:%d}/{slug}'
ARTICLE_SAVE_AS = '{date:%Y}/{date:%b}/{date:%d}/{slug}/index.html'

Pelican constructs the URLs and save paths by calling these strings’ format methods, with a bunch of metadata as arguments. This allows you to use strftime format codes in the URLs as in the above example.

However, apparently strftime() doesn’t have a format code for the month name in lowercase, and I prefer to not use uppercase letters in URLs.

My solution to this was to write a minimal Pelican plugin that adds the lowercase month name as a separate variable to the metadata, and then I can use that variable in the ARTICLE_URL and ARTICLE_SAVE_AS settings.

Here is the plugin:

from pelican import signals

def add_lowercase_month_to_metadata(content):
    if "date" in content.metadata:
        content.metadata["lowercase_month"] = content.metadata["date"].strftime("%B").lower()
        content.metadata["lowercase_month_short"] = content.metadata["date"].strftime("%b").lower()

def register():

And here are my new URL settings:

ARTICLE_URL = '/{date:%Y}/{lowercase_month_short}/{date:%d}/{slug}'
ARTICLE_SAVE_AS = '{date:%Y}/{lowercase_month_short}/{date:%d}/{slug}/index.html'

Note that the plugin must be activated by adding it to the Pelican PLUGINS setting. See the Pelican docs on plugins for info on how to do that.