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#OTD

12,262
posts · 30d
660
users
409
posts / day
18.6
posts / user
+ 1% vs last week

#OTD is an active hashtag on Bluesky. In the last 30 days, 660 people shared 12,262 posts with it — around 409 a day. Activity is up 1% versus the previous week, peaking on Sep 1 with 546 posts.

#OTD posts per day (last 30 days)

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Tags most often used together with #OTD.

#History 1,705 #TDIH 1,017 #OnThisDay 964 #MusicSky 920 #Arsenal 817 #WW2 649 #Cuba 434 #medicine 428 #salud 428 #health 428 #medicina 428 #HBD 414

Posts with #OTD

Admirable Women
@admirablewomen.bsky.social
1 day ago
NASA astronaut Sunita Williams is the second-most experienced female spacewalker with 9 spacewalks. Her total spacewalk time of 62 hours and 6 minutes is fourth overall and the most by a woman. She was born #OTD in 1965. #WomenInSTEM
An official NASA portrait of astronaut Sunita Williams wearing a full white Extravehicular Mobility Unit (EMU) spacesuit. The bulky suit displays an American flag patch on the left shoulder, a mission patch on the right, and various controls on the chest pack; she holds the gold-visored helmet. With long dark hair framing her smiling face, she poses confidently in front of a large draped American flag against a cloudy Earth-toned backdrop, symbolizing American space exploration.
47 886 4175
Frank Amari
@frankamari.bsky.social
almost 2 years ago
"One of the great tragedies of mankind is that morality has been hijacked by religion. So now people assume that religion and morality have a necessary connection. But the basis of morality is really very simple and doesn't require religion at all." -- Arthur C. Clarke, born #OTD 1917
966 8352 35596
Admirable Women
@admirablewomen.bsky.social
2 days ago
N.K. Jemisin is the first author to win the Hugo Award for Best Novel in 3 consecutive yrs for her Broken Earth series & first to win for all 3 novels in a trilogy. Recipient MacArthur Genius Grant, 2020. She was born #OTD in 1972. Happy Birthday @nkjemisin.bsky.social 🎈 #SciFi #Fantasy #BookSky
A montage portrait of science fiction author N.K. Jemisin. On the left, she appears in a close-up photo with long, dark braided hair, wearing earrings, a delicate necklace with a pendant, a deep maroon sweater, and a shimmering green scarf draped around her neck. She has a calm, confident expression and gazes directly at the camera against a softly blurred dark background. To the right are three stacked book covers of her works. Top: The Fifth Season (The Broken Earth trilogy), with a dark, textured design and metallic title. Middle: The Obelisk Gate, featuring an intricate, glowing red-and-purple circular mandala-like emblem. Bottom: The Stone Sky, showing a dramatic stormy sky with a massive floating obelisk. The overall composition highlights the author alongside prominent covers from her award-winning Broken Earth series.
46 502 2113
Frank Amari
@frankamari.bsky.social
almost 2 years ago
"Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it's the only thing that ever has." -- Margaret Mead, who died #OTD 1978
174 2008 16958
Admirable Women
@admirablewomen.bsky.social
2 days ago
Pathologist Dr. Elizabeth Stern's pioneering research in cytopathology transformed cervical cancer from a frequently fatal disease into a highly treatable and preventable disease. Her research revolutionized women’s healthcare. She was born #OTD in 1915. #WomenInSTEM
A black-and-white portrait of Canadian-American pathologist Dr. Elizabeth Stern (1915–1980), whose pioneering research in cytopathology transformed cervical cancer into a preventable disease. Dr. Stern is positioned slightly at an angle, facing forward with a calm, composed, and serious expression. Her dark hair is styled in a short, neat wave off her forehead, and her gaze is directed toward the camera. She wears a dark, simple collared blouse with subtle dotted textures. The composition focuses entirely on her upper shoulders and head against a stark, light-colored, uncluttered background that provides a high-contrast framing. The lighting is soft and even, highlighting her facial features. The overall mood is formal, dignified, and academic, capturing a historic visual record of an influential woman in STEM.
17 538 1757
Admirable Women
@admirablewomen.bsky.social
1 day ago
#OTD in 1893, New Zealand became the first self-governing country in the world to grant all adult women the right to vote in national parliamentary elections. The first election held after this milestone was in November 1893--an incredible 82% of registered female voters voted. #WomensSuffrage
This image shows a bronze bas-relief detail from the Kate Sheppard National Memorial located on Oxford Terrace in Christchurch, New Zealand. A tribute to New Zealand's women's suffrage movement, depicting prominent campaigners. From left to right, the main figures featured in the sculpture are Meri Te Tai Mangakāhia, Amey Daldy, Kate Sheppard (center next to a wheelbarrow of suffrage petitions), Ada Wells, Harriet Morison, and Helen Nicol. The monument honors the landmark 1893 Electoral Act, signed on 19 September 1893, which made New Zealand the first self-governing country in the world where women won the right to vote in parliamentary elections.
23 420 1618
Admirable Women
@admirablewomen.bsky.social
3 days ago
Susan La Flesche Picotte: the first #NativeAmerican woman to earn a medical degree in the US. Living in an era when Native Americans were denied citizenship & women couldn't vote, she became an indispensable physician & fierce defender of her people's sovereignty. Died #OTD in 1915. #WomenInSTEM 🧵
A black-and-white studio portrait of Dr. Susan La Flesche Picotte (1865–1915), the historic reformer celebrated as the first Native American woman to earn a medical degree in the United States. In a bust-up composition against a dark, textured backdrop, she is positioned slightly turned to the side while facing the camera directly. She looks forward with an intelligent, steady, and composed expression, her dark hair neatly swept up away from her face into a soft bun. She wears a Victorian-era garment featuring a high-necked collar made of a contrasting, intricately patterned light fabric with fine floral or geometric motifs. This collared section is framed by a square, dark lace trim on her darker, structured bodice, which has modest pleating and slight puffing at the shoulders. The soft studio lighting emphasizes her prominent cheekbones and the calm, dignified mood of the portrait, embodying her historic legacy as an enduring pioneer of Indigenous health and civil rights.
29 610 1869
Admirable Women
@admirablewomen.bsky.social
4 months ago
Dr. Patricia Bath overcame sexism, racism & poverty and saved the sight of millions of people. She invented the Laserphaco Probe for cataract treatment, 1986; it was patented in 1988. She co-founded the American Institute for the Prevention of Blindness, 1976. She died #OTD in 2019. #WomenInSTEM
A vibrant color historical photograph capturing the brilliant ophthalmologist, inventor, and academic Dr. Patricia Era Bath (1942–2019) in an office or laboratory setting, radiating an aura of confident intelligence and warm approachability. Occupying the center and right of the shot, Dr. Bath sits facing forward, smiling brightly with a direct, engaging gaze at the camera. She is dressed in a professional white medical lab coat—subtly embroidered with "Dr. Bath" in red cursive on the left lapel—worn over a light blue button-down denim shirt and accented by a polished gold chain necklace. Pens are visible tucked into her left coat pocket. Positioned prominently to her right on the left side of the frame is a large, white medical laboratory microscope or ophthalmic imaging equipment with black eye-pieces. The background shows a white wooden bookshelf packed with colorful medical texts, binders, and stacked papers. This portrait carries immense historical significance, honoring a legendary trailblazer in STEM who became the first Black female doctor to patent a medical device—the revolutionary Laserphaco Probe for cataract treatment—fundamentally restoring sight to millions worldwide.
144 2708 11461
Admirable Women
@admirablewomen.bsky.social
3 months ago
Physicist & chemist Marie Curie was the: + First woman to win a Nobel Prize + First person & only woman to win twice + Only person to ever win a Nobel Prize in 2 different sciences: Physics (1903) & Chemistry (1911) Marie Skłodowska Curie died #OTD in 1934. #WomenInSTEM
A striking black-and-white studio portrait of Marie Curie (1867–1934), the legendary Polish-French physicist and chemist who revolutionized modern science by discovering radioactivity, polonium, and radium. As the only person to win Nobel Prizes in two different scientific fields, her profound historical significance is reflected in her serious, deeply introspective expression. Photographed from the chest up, she looks directly at the camera with an intense, analytical gaze. Her graying hair is styled in a soft updo, framing a face etched with a look of quiet resolve and intellectual focus. She wears a dark, textured jacket over a shirt adorned with a distinctive geometric, black-and-white checkered pattern at the neckline. The portrait utilizes a stark, dark, textured background that blends into her clothing, creating a high-contrast composition that draws complete focus to her face. The overall mood is solemn, dignified, and powerful, capturing the essence of a brilliant academic pioneer who dedicated her life to scientific discovery.
152 2526 10328
Admirable Women
@admirablewomen.bsky.social
about 1 month ago
Computer scientist Margaret Hamilton coined the term “software engineer.” She directed the Software Engineering Division at MIT’s Instrumentation Lab & led development of the on-board flight software for NASA’s Apollo Guidance Computer. She was born #OTD in 1936 & turns 90 today! #WomenInSTEM
Two side-by-side black-and-white photographs of pioneering computer scientist Margaret Hamilton (born August 17, 1936). The left panel features a mature, close-up portrait where Hamilton gazes directly at the viewer with a serene, confident, and reflective expression, framed by her long, dark, slightly silvering hair. The right panel is a famous archival photograph showing a younger Hamilton standing indoors next to a towering stack of bound paper binders containing the Apollo Guidance Computer source code, which she led the development of at MIT. She is smiling broadly and wears a striped, long-sleeved mini dress with dark Mary Jane shoes and glasses, resting her hand proudly on top of the massive column of printed code. The overall composition contrasts her youthful triumph with her enduring legacy, capturing an optimistic, intellectually rigorous mood that highlights her monumental contributions to space exploration.
145 2361 10159
Admirable Women
@admirablewomen.bsky.social
5 months ago
Lucille Ball--actress, comedian, producer & film-studio executiver--died #OTD in 1989. In 1962, she bought out Desi Arnaz's interest in Desilu Productions & became the 1st woman to own & run a major TV studio. Desilu produced many popular TV series including Mission: Impossible & #StarTrek. #legend
This classic black-and-white studio portrait captures the legendary Lucille Ball (1911–1989), an American actress, comedian, and pioneering studio executive. Best known for her iconic role in I Love Lucy, Ball was the first woman to lead a major television studio, Desilu Productions. In this elegant, close-up composition, Ball looks directly at the camera with a calm and poised expression. Her light-colored hair is styled in elaborate, high-volume rolls that sweep upward from her forehead, typical of the sophisticated 1940s glamour. She wears a shimmering, light-toned jacket with a subtle grid pattern that catches the light. Her ensemble is accented by large, round, sparkling cluster earrings that draw attention to her face. The lighting is soft yet focused, highlighting her perfectly applied makeup—defined brows, dark mascara, and a polished, dark lip color. The background is softly out of focus, featuring a neutral, textured wall with organic, leaf-like shadows that create a sense of depth.
248 1544 9817

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