#onthatday

Live, measured metrics for the hashtag #onthatday from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.

hashtag.org network · sponsored

Own #onthatday

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.

$51.02/ year · 9-character #name
Claim #onthatday — $51.02/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
0
Uses / 7 days
Mastodon
0
Accounts / 7 days
Mastodon
40
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 40
0
Avg reactions / post
Mastodon · last 40
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · mastodon.social (Mastodon public tags API) · fetched 2026-10-22 23:27 UTC
0
10-16
0
10-17
0
10-18
0
10-19
0
10-20
0
10-21
0
10-22

0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.

Related hashtags

measured · mastodon.social (Mastodon public search API) · fetched 2026-10-22 23:27 UTC

No related tags with measured usage found for #onthatday.

Live pulse

measured · mastodon.social (Mastodon tag timeline) · fetched 2026-10-22 23:27 UTC

Everything below is measured over the latest 40 public posts (spanning ~3552 hours).

Posting hours (UTC) — busiest: 08:00

00:0012:0023:00

Languages: English (39) · French (1)

Avg boosts / post: 0

Top of the latest posts

  • 🇫🇷 Il y a 56 ans aujourd'hui, Air France passait sa première commande d'Airbus A300. #onthatday #airfrance #avgeek

    air plus news@[email protected]♥ 0↻ 02026-09-03 08:36 UTCView post →

  • 30.04. #OnThatDay 1979: Maastricht (Niederlande) und Koblenz besiegeln ihre Partnerschaft – europäischer Brückenschlag über die Grenzen. #Koblenz #Maastricht #Europa #Partnerstadt

    Koblenz am Eck@deutscheseck♥ 0↻ 02026-04-30 08:08 UTCView post →

  • 30.04. #OnThatDay 1917: Leo Mayer aus Koblenz wird mit seiner Familie 1942 deportiert. Ein Stolperstein erinnert an ihn. #Koblenz #Stolpersteine #Holocaust #Mayer

    Koblenz am Eck@deutscheseck♥ 0↻ 02026-04-30 08:07 UTCView post →

#onthatday across platforms

every network with a public tag surface

Follow #onthatday 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.

X (Twitter) ↗Instagram ↗TikTok ↗Facebook ↗LinkedIn ↗YouTube ↗Threads ↗Bluesky ↗Mastodon ↗Reddit ↗Pinterest ↗Tumblr ↗

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/onthatday