Windows build fails due to unsupported strftime("%-d") format in homepage template

[ki-kyvos]

Description

While building the OSSIE website on Windows, the build fails with the following exception:

ValueError: Invalid format string

The error originates from the homepage template:

{{ post.date.strftime('%B %-d, %Y') }}

The %-d format specifier is supported on Unix-like platforms but is not supported by Python's strftime() implementation on Windows.

As a result, mkdocs serve and mkdocs build fail on Windows.

Steps to Reproduce

1. Clone the repository on Windows.
2. Install the project dependencies.
3. Run:

mkdocs serve

or

mkdocs build

Actual Result

The build fails with:

ValueError: Invalid format string

Expected Result

The website should build successfully on Windows, Linux, and macOS.

Possible Solution

Use a cross-platform date formatting approach instead of %-d.

One possible implementation is:

post.date.strftime("%B %d, %Y").replace(" 0", " ")

This preserves the existing output format (for example, July 3, 2026) while remaining compatible across Windows, Linux, and macOS.

Alternatively, another platform-independent formatting approach could be used if preferred.