Note
This does not work on quarantined subreddits.
Cake Day Neighbours is a simple website that allows people to find the 15 named identifiers that joined before and after any Reddit username or community. Please expect most of them to be inactive.
Press the "GitLab Pages" link to visit the site, or use "Demo" if you came from Flavortown.
Every timestamp shown can be independently verified by hovering the join date after clicking the Old Reddit link on the left of the table using a desktop computer on the web interface. (Reddit mobile apps don't count because the information returned from their servers use the start of the UTC day.)
It may take several seconds for the search results to show up on a slower connection.
You can click the timestamp to jump to that user. Useful for "scrolling" up or down!