Wrong archive date group

[tamasgt]

Contribution guidelines

• I've read the contribution guidelines and wholeheartedly agree

I've found a bug and checked that ...

• ... the problem doesn't occur with the mkdocs or readthedocs themes
• ... the problem persists when all overrides are removed, i.e. custom_dir, extra_javascript and extra_css
• ... the documentation does not mention anything about my problem
• ... there are no open or closed issues that are related to my problem

Description

Hello, can you look at this? I first noticed the 2022 one, then I tried it with 2021 as well.

Post date	Archive date	Ok?
2021-01-01	2020	Wrong
2021-01-02	2020	Wrong
2021-01-03	2020	Wrong
2021-01-04	2021	Ok
2022-01-01	2021	Wrong
2022-01-02	2021	Wrong
2022-01-03	2022	Ok
...	...	Ok
2022-01-07	2022	Ok

Expected behaviour

To a correct archive date.

Actual behaviour

Steps to reproduce

Minimal project: test-material.zip

Package versions

mkdocs: 1.3.1
mkdocs-material: 8.5.3+insiders.4.23.5

Configuration

site_name: Test Material

# Theme
theme:
  name: material
  language: en
  custom_dir: overrides
  features:
    # Navigation settings
    - navigation.instant
    - navigation.tracking
    - navigation.tabs
    # - navigation.tabs.sticky kikapcsolva, így kisebb a fejléc.
    - navigation.top
  palette:
    # Palette toggle for automatic mode
    - media: "(prefers-color-scheme)"
      toggle:
        icon: material/brightness-auto
        name: Switch to light mode
    # Palette toggle for light mode
    - media: "(prefers-color-scheme: light)"
      # scheme: youtube
      scheme: default
      primary: teal
      accent: orange
      toggle:
        icon: material/brightness-7
        name: Switch to dark mode
    # Palette toggle for dark mode
    - media: "(prefers-color-scheme: dark)"
      scheme: slate
      primary: teal
      accent: orange
      toggle:
        icon: material/brightness-4
        name: Switch to system preference
  #Font
  font:
    text: Roboto
    code: Roboto Mono

plugins:
  - search:
      lang: hu
  - blog:
      enabled: true
      # post_url_date_format: YYYY-MM-dd
      # Default url format
      # post_url_format: "{date}/{slug}"
      # post_url_format: "{slug}"
      # post_readtime: false
  #- rss:
      #match_path: blog/posts/.*

nav:
  - Home: index.md
  - Sample 1:
    - Page 1: sample-1/page-1.md
    - Page 2: sample-1/page-2.md
  - Sample 2:
    - Page 1: sample-2/page-1.md
    - Page 2: sample-2/page-2.md
  - Blog:
    - blog/index.md

System information

Windows 10
Chrome

[squidfunk]

Thanks for reporting! This is expected behavior for YYYY according to Babel (which I didn't knew). Switching to yyyy fixes the problem. Fixed in squidfunk/mkdocs-material-insiders@be490bb64. I've also adjusted our documentation in 9de5885.

[squidfunk]

Released as part of 8.5.3-insiders-4.23.6.