The Unicode CLDR is a (plaintext) database of locale-specific information for localization. We can then use the Python Babel library to consume that information, allowing us to localize:

• Dates and times, including month names and days of the week
• Timezone names
• Plural rules (can supersede our custom implementation)

Pulling in the CLDR will likely require a separate build step from just importing the Babel library. Ideally this build step shares code between local dev and container-building scenarios. We can also support a CLDR-less fallback for local dev scenarios.