#unbirthday
Live, measured metrics for the hashtag #unbirthday from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #unbirthday
This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.
Day-by-day usage
measured · mastodon.social (Mastodon public tags API) · fetched 2026-10-09 19:03 UTCNo measured public usage for #unbirthday in the last 7 days. That is a real result, and a good one to know: this hashtag is wide open right now. We show a dash before we ever show a made-up number. Browse the trending index for tags with live measurements.
Related hashtags
measured · mastodon.social (Mastodon public search API) · fetched 2026-10-09 19:03 UTCNo related tags with measured usage found for #unbirthday.
Live pulse
measured · Mastodon tag timeline · fetched 2026-10-09 19:03 UTCNo recent public posts found for #unbirthday on Mastodon. Nothing measured, so nothing shown.
What “unbirthday” means
WikipediaAn unbirthday is an event celebrated on all days of the year which are not a person's birthday. It is a neologism which first appeared in Lewis Carroll's 1871 novel Through the Looking-Glass. The concept gave rise to "The Unbirthday Song" in the 1951 animated feature film Alice in Wonderland.
“Unbirthday” on Wikipedia (CC BY-SA) →#unbirthday across platforms
every network with a public tag surfaceFollow #unbirthday straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.
Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/unbirthday