Tantek Çelik

“Choice. The solution is choice.”*

You should download Firefox 148 (released today!) and explicitly set the new "AI Controls" to your preferred choice.
* https://www.firefox.com/

Disclosure: I work for Mozilla, but this post, like all on this site, represents my personal thoughts and opinions […]

Happy Twin Peaks day to those who celebrate!

In Agent Cooper’s first appearance in the show, he’s driving a car, right hand on the steering wheel, left hand holding a small black box (a microcassette recorder), that, if you don’t look too closely, could easily be mistaken for a regular sized […]

at the @CSSWG.org (@CSSWG) F2F (face to face) meeting^1, hosted by @Apple.com (@Apple) in Cupertino. Not counting at #w3cTPAC, the prior #CSSWG F2F meeting I went to was 2.5y ago, also in Cupertino, and before that 2019 in SF. Good to see so many longterm colleagues in-person.

#W3C #CSS […]

Wikipedia “Edited” 2025 year in review, summarizing from Wikimedia XTools queries, and Wikipedia itself, curated manually for my personal site:

* 7 articles created (new personal best), with several firsts for me. In creation order:
* "Take California" ( […]

Beyond aggregated and summarized stats, in 2025 I met a few amazing people (you know who you are), and started a few projects. Most of these projects started with an idea, or recognizing a problem, that inspired invention.

Sometimes the ideas came from observations, shared, questioned […]

My year in movies in theaters, using Fandango > My Orders > History, my Swarm Timeline, and personal recollection, to aggregate a few lists and stats:

I saw 9 new movies in theaters in 2025, two of them multiple times (dates are first viewing)
* 2025-02-20 Captain America: Brave New World
* […]

My Year in Sport, using data from my Strava, Swarm, and personal notes & recollections, assembled into a simpler summary on my personal site.

2025 activities according to Strava:
🏃🏻‍♂️1354mi + 160,077' hiking+running
👟 823mi + 119,453' running
⛰ 485mi trail running
🛣 337mi road running
🥾 526mi […]

My Seek 2025 Year in Review:

* 101 new species observed (down from 141 last year)

Top three kinds:
* 64 new plants (down from 79)
* 14 new insects (down from 20)
* 8 new fungi
* 4 new challenge badges earned (down from 56)

July, June, February were the months I observed the most new species […]

screenshot of Strava iOS native app showing the “You” screen with Progress, Activities, an orange Year in Sport banner, various activity types Hike, All Run, Run, and a “This week” heading with Distance, Time, Elev Gain column headers below it.

I checked my Strava: Year in Sport 2025 after I did my last run on the 31st, and it felt a bit light. When I checked my saved images/videos from last year’s Strava Year in Sport, it was clear they had dropped several things from 2024 to 2025.


First, here’s […]

[Original post on tantek.com]

2026 goals I’ve heard:
* Dry January — avoid alcohol
* Meatless January — avoid meat

If you have a personal website, how about also:

* No Socials January — avoid #socialMedia silos

No posting on social media, just for a month (not counting DMs).

Instead, since you have your own website, post […]

2025 #donation suggestions. I #donated to these, #donate to those that resonate:

@ACLU
@CalAcademy
@NAACP
@deYoungMuseum
@ExperienceCamps
@Exploratorium
@EFF
@Wikipedia
@InternetArchive
@SFMOMA
@KQED
@MontereyAq
@SPLCenter
@LongNow
@RPF_EB
@GardensofGGP
@PPact
@Mozilla**

**Disclosure: I work […]

Important #indieweb lesson in #modular website setup this morning:

Keep your DNS provider separate from your CDN separate from your webhost, so you can swap out any one of them as necessary, whether for economic or as it were today, reliability reasons. And make sure those services themselves […]

π Happy ordinal pi day! (314th day of the year)

No, it should not be the US-centric March 14th, which most of the world writes as 14/3 or 14-3.

Science and mathematics are international, without borders, not specific to any one country or culture. As scientists and mathematicians we should […]

Great #indieweb sessions at #btconf #Berlin!

Yesterday, Sacha Judd (@sachajudd.com) reminded us to “teach someone …. something about building for the web”, and to “take back control of your feeds, your attention, and … go exploring again”. She encouraged us to “build healthy online […]

IndieWebCamp Berlin was great! Participants facilitated inspiring sessions, and everyone made something on or for their personal site on our Create Day #Hackathon.

Session notes are up from day 1, recordings to follow:
* https://indieweb.org/2025/Berlin/Schedule

Demos notes also up, recording […]

🎃 Night before IndieWebCamp Berlin! Participants are (hopefully, mostly) all tucked into their beds, dreaming of what wonderful things they can brainstorm for their personal sites Saturday, and #HackTheirPlanet on Sunday.

Want to keep up with #IndieWebCamp #Berlin participants?

Follow their […]

October is almost over! For all us procrastinators, still time to write a post or two to participate in #October blogging challenges like:

#Blogtober
#IndieWebMovieClub on #Hackers
#Inktober
#Mathober
#WeirdWebOctober

+ coding challenges:
#Hacktoberfest

Many more at:
* […]

Pixelated space man on a black background with a lavender decorative border and text at bottom LEVEL 0 Contributor and light green bursts behind it

… speaking of badges (Wikipedia User: 20 year editor badge in my previous post) …

I got the #Hacktoberfest 2025: Level 0 Registered badge from Hacktoberfest @hacktoberfest @digitalocean! https://www.holopin.io/hacktoberfest2025/userbadge/cmhas5f6h003bje041kcld1is via @holopin_

Sunday was my 20th #Wikipedia editing anniversary.

I have created:
* over 25 content articles (that have survived), averaging just over 1 per year
* over 100 redirects to make it easier to find pages, and to find topics which are only documented as sections of existing pages.

This year I’ve […]

Numerous #w3cTPAC breakout sessions have been proposed.

* https://github.com/w3c/tpac2025-breakouts/issues/?q=is%3Aissue%20state%3Aopen%20sort%3Acreated-asc

If you plan to participate in TPAC breakouts, whether in-person or remote, take a look and give the ones that look interesting to you […]

Happy #8bitday yesterday! It was the 256th day of the year.

See last year’s post for why the 256th day is 8-Bit Day: https://tantek.com/2024/256/t1/happy-8bitday-binary-byte

Since last year, the related Wikipedia article on “Programmer’s Day” (https://en.wikipedia.org/wiki/Programmer%27s_Day) […]

fire, water, wind, steam, electric, solar, nuclear

What are the things on your bucketlist that being a billionaire would make no difference?

When I was in Berlin at the end of last month, I was chatting with my pal Mo, and noted a sticker I’d seen that said “ELON MUSK DIDN’T GET INTO BERGHAIN” with a QR code that linked to […]

Finished the #Skyline50k #trailRace in 9:34:51 yesterday! My 3rd best 50k, and first 50k in over two years since the Marin Ultra Challenge 50k in 2023.

It was quite the journey to get back here, and a lot went well in this race. From training to preparing and planning, the temperate cool […]

The Vision for W3C has been officially published as a ratified W3C Statement: https://www.w3.org/TR/2025/STMT-w3c-vision-20250729/

As one of the editors, along with Chris Wilson (@cwilso.com @c@w3c.social), I’m both proud of this multi-year W3C Advisory Board (AB) effort, and grateful to […]

I really enjoyed the IndieWeb Movie Club May 2025 submissions about the film “Tomorrowland”. Ordered from earliest to most recent:

* Paolo Feadin: https://www.feadin.eu/en/posts/tomorrowland
* Thomas Vander Wal: https://vanderwal.net/random/entrysel.php?blog=2119
* gRegor Morrill […]

🎂 Congrats @microformats.org on 20 years! #microformats20

Even after 20 years, people keep discovering new ways of using #microformats:
* @artlung.com: "WML, WAP, & Microformats Demo!" (https://lab.artlung.com/wml/faux)
> Because WML elements may have the class attribute
Originally posted […]

Ran my 13th Bay to Breakers race in 1:55:31 today! 4min+ faster than last year.

Once again the Midnight Runners crew cheered runners in Hayes Valley at the park a couple of blocks before the hill.

Felt better than I did last year, more able to sustain a moderate pace.

One quick pitstop in […]

Last Friday I published my second Cybersecurity Friday post with three more key steps for cybersecurity. In summary:

1. Different email address for each account, AKA email masking. Use or create a different email alias for each service you sign-up for.
2. Different password for each account […]

May the Fourth be with you!

There’s a movie discussion podcast that I discovered via my pal Tom Coates (@plasticbag.org @tomcoates@me.dm @tomcoates) when he posted their episode on the movie Gattaca^1 where they had him on as a special guest.

Originally started in 2020 as “Dune Pod” about all […]