Cal Henderson, born on January 17, 1981, is a British computer programmer and author based in San Francisco. He is best known as the co-founder and CTO of Slack and for his role in developing the online community B3ta and the photo-sharing application Flickr. Henderson authored 'Building Scalable Web Sites' and has worked on various web projects, contributing to making technology more accessible. He is also active in open-source software and has engaged in political donations, demonstrating his wide-ranging influence in technology and community engagement.
Zodiac Sign (Western)
Sunsign, Tropical Zodiac
Zodiac Sign (Vedic)
Moonsign, Sidereal Zodiac
Age (Today)
Your next birthday is 53 days away.
Place of Birth
Time Zone -
Chinese Zodiac Sign
Birth Number
Life Path Number
Name Number (Chaldean)
Name Number (Pythagorean)
Meaning of the name - Cal
While Cal doesn't have a direct meaning, it is often associated with warmth, friendliness, and a vibrant spirit. It can also evoke a sense of simplicity and strength.
Read Full Cal Name AnalysisJanuary 17, 1981 Facts
Generation Group
Cal Henderson belongs to the Millennials group.
Educated At: Sharnbrook Academy
Occupation: blogger | engineer
Employers: Slack | B3ta | Ludicorp | Yahoo | EMAP | Tiny Speck
Astrology Analysis
Ephemeris for January 17, 1981
Note: Moon position is location and time sensitive.| Planet | Position (Tropical, Western) | Transits on January 17, 2024 | Secondary Progressions for January 17, 2024 |
|---|---|---|---|
| Sun | 27 Capricorn 31 | 27 Capricorn 4 | 11 Pisces 2 |
| Moon | 24 Gemini 9 | 21 Aries 11 | 11 Capricorn 1 |
| Mercury | 8 Aquarius 30 | 4 Capricorn 8 | 19 Aquarius 52 |
| Venus | 8 Capricorn 2 | 23 Sagittarius 3 | 1 Pisces 50 |
| Mars | 14 Aquarius 0 | 9 Capricorn 48 | 17 Pisces 58 |
| Jupiter | 10 Libra 9 | 6 Taurus 5 | 8 Libra 15 |
| Saturn | 10 Libra 11 | 4 Pisces 50 | 8 Libra 44 |
| Uranus | 29 Scorpio 13 | 19 Taurus 9 | 0 Sagittarius 10 |
| Neptune | 23 Sagittarius 39 | 25 Pisces 23 | 24 Sagittarius 41 |
| Pluto | 24 Libra 19 | 29 Capricorn 53 | 24 Libra 1 |
| Rahu | 11 Leo 37 | 19 Aries 59 | 9 Leo 21 |
| Ketu | 11 Aquarius 37 | 19 Libra 59 | 9 Aquarius 21 |
Chandra Kundali (Equal House, North Indian Diamond Chart)
Astrology Transits Analysis for Year 2024
Note: Multiple transits occurring in close proximity often signify a major event in a person's life.Cal Henderson's 2024 Transits to Natal Planets
- Mars conjunction Sun
Exact: 10 February, 2024 - Jupiter trine Venus
Exact: 10 February, 2024 - Mars conjunction Mars
Exact: 01 March, 2024 - Jupiter trine Sun
Exact: 20 May, 2024 - Jupiter trine Mercury
Exact: 29 June, 2024 - Jupiter trine Jupiter
Exact: 09 July, 2024 - Jupiter trine Saturn
Exact: 09 July, 2024 - Ketu conjunction Jupiter
Exact: 09 July, 2024 - Ketu conjunction Saturn
Exact: 09 July, 2024 - Jupiter trine Ketu
Exact: 19 July, 2024 - Jupiter trine Mars
Exact: 29 July, 2024 - Mars opposition Venus
Exact: 17 September, 2024 - Mars opposition Sun
Exact: 27 October, 2024
