Add formatting of "st", "nd", "rd", and "th" suffixes for day numbers?

[rask]

Would it be possible to introduce a new format argument for st, nd, and rd for each respective day number? At least the current documentation has notion of this being available.

• June 1st
• August 2nd
• December 3rd
• November 5th
• July 22nd
• ...

I know this is not implemented in strftime/strptime, is purely stylistic, a burden to localize, and is relatively simple to do with a few match arms on the implementors end.

But this would be really nice to have, especially when using things like templating languages that use chrono for date formatting (e.g. Tera+Gutenberg) but don't expose any chrono logic as is.

Here is an example of what I need to do in Tera/Gutenberg to achieve suffixes:

{% macro nicedate(date) %}
    {% set daynum = date | date(format="%d") %}

    {% if daynum == "1" or daynum == "21" or daynum == "31" %}
    {% set suffix = "st" %}
    {% elif daynum == "2" or daynum == "22" %}
    {% set suffix = "nd" %}
    {% elif daynum == "3" or daynum == "23" %}
    {% set suffix = "rd" %}
    {% else %}
    {% set suffix = "th" %}
    {% endif %}

    {{ daynum }}<sup>{{ suffix }}</sup> {{ date | date(format="%B, %Y at %H:%M") }}
{% endmacro nicedate %}

[clarfonthey]

The ordinal crate does this

[ZanderBrown]

Would be good to have this, feels weird formatting dates without the suffix option

[maciejhirsz]

Just stumbled upon this issue after looking through Zola (prev. Gutenberg) for the exactly same purpose as the OP. Having a formatting option for the day of the month with suffix would be greatly appreciated.

[Aloso]

Note that in German, we write the number first and then the month, e.g. “1. Juni”, “22. November”. In Spanish, we write “1 de junio”, “22 de noviembre”. In Italian, the day of the month is usually written in words.

With so many different options, this is a very complex problem to solve, so I think it deserves its own crate. chrono_locale is a good attempt at this.