#hCalendar

Live, measured metrics for the hashtag #hCalendar 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 #hcalendar

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 #hcalendar — $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
1
Recent posts
Mastodon
—
Recent pace
Mastodon · last 1
0
Avg reactions / post
Mastodon · last 1
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · mastodon.online (Mastodon public tags API) · fetched 2026-10-16 18:09 UTC
0
10-10
0
10-11
0
10-12
0
10-13
0
10-14
0
10-15
0
10-16

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.online (Mastodon public search API) · fetched 2026-10-16 18:09 UTC

No related tags with measured usage found for #hcalendar.

Live pulse

measured · mastodon.online (Mastodon tag timeline) · fetched 2026-10-16 18:09 UTC

Everything below is measured over the latest 1 public posts.

Posting hours (UTC)

00:0012:0023:00

Languages: German (1)

Avg boosts / post: 1

Top of the latest posts

  • Microformats: Value Class Pattern Das bisher wohl größte Problem bei der Verwendung von Microformats ist (oder besser wahr) die Accessibility durch die etwas zweckentfremdete Verwendung des -Tags. Das so genanntes abbr-design-pattern diente

    Matthias Pfefferle@[email protected]♥ 0↻ 12009-05-12 17:33 UTCView post →

What “hcalendar” means

Wikipedia

hCalendar is a microformat standard for displaying a semantic (X)HTML representation of iCalendar-format calendar information about an event, on web pages, using HTML classes and rel attributes.

“HCalendar” on Wikipedia (CC BY-SA) →

#hcalendar across platforms

every network with a public tag surface

Follow #hcalendar 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/hcalendar