Background
On This Day surfaces historical events that occurred on the current calendar date across different years. It connects readers to Wikipedia's depth of historical content and gives the feed a sense of temporal context and discovery. The module is designed to feel like an interactive timeline — giving readers a sense of traveling through history as they scroll, rather than reading a static list of events.
User Story
As a reader browsing the Community Picks feed, I want to see significant historical events that happened on today's date in an engaging visual format, so that I can explore Wikipedia's historical content and feel a sense of how events connect across time.
Requirements
- The module should display the title "On this day" with the subtitle "Discover historical events from this day"
- Events should be displayed as a timeline. A continuous thread should run with the cards, with each card anchored to a node point on the line representing its year
- At least 1 randomly chosen event should be previewed in the Feed, with the option to expand into a timeline to explore
- Each card should display the year prominently at the top, "X years ago" in smaller text below it, an article thumbnail image, and a short description
- Each article card should have its own three dot menu for individual card actions (utilize existing longpress menu)
- Cards should be ordered chronologically, so that scrolling moves the reader through time
- The three dot more menu should be present on the module per the shared menu behavior
- Content should be sourced from the user's selected language wiki. If the module does not exist in the selected language wiki it should be hidden
- More option leads to existing "On this day" timeline view

