John Hartman's Birth Card: The 5 of Diamonds

In the record

John Hartman (March 18, 1950 – December 29, 2021) was an American drummer who was a co-founder and original drummer of the Doobie Brothers. The birth-card coordinate for March 18 is the 5 of Diamonds — a calendar position, not a forecast of the 2020 Performers with The Doobie Brothers induction.

Rock Hall record

• 2020 Performers — inducted member of The Doobie Brothers

The 5 of Diamonds coordinate

John Hartman's birthday maps to the 5 of Diamonds (The Dynamic Entrepreneur). Card Blueprints treats that as a 365-day coordinate: solar value = 55 − (2 × month + day), and the year is unused. It is not a prediction about a Rock & Roll Hall of Fame vote and not a verdict on John Hartman. The card's own language, quoted as system copy rather than biography: You adjust the resource plan when the ground moves, without pretending nothing changed.

Live 5 of Diamonds meaning page

John Hartman in the public record

At the band's inception, Hartman was the sole drummer. However, in late 1971, the group added drummer Michael Hossack, and the dual-drummer formation remained until 2016 when Ed Toth became the band's sole drummer. Hossack was replaced in 1973 by Keith Knudsen. John Hartman was born in Falls Church, Virginia on March 18, 1950. Hartman formed The Doobie Brothers in 1970, and played on all of the band's major hits of the 1970s, with both Tom Johnston and Michael McDonald. He left early in 1979, following a promotional tour in support of the award-winning Minute by Minute, album to look after Arabian horses on his California ranch. Hartman was enticed to join twelve Doobies alumni (including drummers Hossack, Knudsen, and Hartman's own 1979 replacement Chet McCracken) for a brief benefit tour in 1987. Hartman subsequently rejoined when the band was reconstituted the following year.

Summarised from the lead section of the Wikipedia article John Hartman (CC BY-SA 4.0). No biographical facts were written for this page beyond that article.

Where the record meets the 5 of Diamonds

A card is a calendar coordinate, not a cause. What follows sets one line of the card's own published language beside one sentence of the sourced record, paired by a documented rule. It is a resemblance offered for the reader to weigh — not a claim about John Hartman, and not a forecast of induction.

Quick adaptation to market changes

John Hartman (March 18, 1950 – December 29, 2021) was an American drummer who was a co-founder and original drummer of the Doobie Brothers.

Paired on value and commerce — the domain ♦ governs in this system. Markers in the record: founder.

Also on the record

1. He played on the reunion albums Cycles (1989) and Brotherhood (1991), as well as the accompanying promotional tours.
2. However, following a 1992 alumni reunion for the benefit of terminally ill percussionist Bobby LaKind, Hartman retired permanently from the band.
3. He was replaced by his former partner, Keith Knudsen.
4. In 2020, he was inducted into the Rock and Roll Hall of Fame as a member of The Doobie Brothers.

Other inductees with this card

• Bobby Darin — 1990 Performers
• Bun E. Carlos — 2016 Performers with Cheap Trick
• Claydes Charles Smith — 2024 Performers with Kool & the Gang
• David Byrne — 2002 Performers with Talking Heads
• Dusty Springfield — 1999 Performers
• Gene Cornish — 1997 Performers with The (Young) Rascals
• Jack Bruce — 1993 Performers with Cream
• Jimmy Reed — 1991 Performers
• Kurt Cobain — 2014 Performers with Nirvana
• Mavis Staples — 1999 Performers with The Staple Singers
• Pete Farndon — 2005 Performers with The Pretenders
• Roger Waters — 1996 Performers with Pink Floyd
• 8 more inductees share this card.

FAQ

What is John Hartman's birth card?

The 5 of Diamonds. March 18 maps to that card through the public Card Blueprints formula. The year of birth is not used.

Does a birth card predict a Rock Hall induction?

No. These pages are coordinates, not fortune-telling. A birth card names a calendar day in a 52-card year. It does not forecast awards, character, or fate.

Where do John Hartman's dates come from?

Birth date 1950-03-18 is the day-precision date on John Hartman's Wikipedia infobox, verified against Wikidata P569 (CC0, day precision, Gregorian preferred). The two sources match. Inductee identity comes from the Wikipedia Performers list, which cites RockHall.com. Year-only dates and Wikipedia↔Wikidata conflicts are dropped, not guessed. Page hooks and evidence come from the Wikipedia REST summary (CC BY-SA 4.0).

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