Some context: The 2012 phenomenon was a range of eschatological beliefs that cataclysmic or otherwise transformative events would occur on or around 21 December 2012. This date was regarded as the end-date of a 5,126-year-long cycle in the Mesoamerican Long Count calendar, and as such, festivities to commemorate the date took place on 21 December 2012 in the countries that were part of the Maya civilization (Mexico, Guatemala, Honduras, and El Salvador), with main events at Chichen Itza in Mexico, and Tikal in Guatemala. Various astronomical alignments and numerological formulae were proposed as pertaining to this date. A New Age interpretation held that the date marked the start of a period during which Earth and its inhabitants would undergo a positive physical or spiritual transformation, and that 21 December 2012 would mark the beginning of a new era.
Maya inscriptions occasionally mention predicted future events or commemorations that would occur on dates far beyond the completion of the 13th b'ak'tun. Most of these are in the form of "distance dates"; Long Count dates together with an additional number, known as a Distance Number, which when added to them makes a future date. On the west panel at the Temple of Inscriptions in Palenque, a section of text projects forward to the 80th 52-year Calendar Round from the coronation of the ruler K'inich Janaab' Pakal. Pakal's accession occurred on 9.9.2.4.8, equivalent to 27 July 615 AD in the proleptic Gregorian calendar. The inscription begins with Pakal's birthdate of 9.8.9.13.0 (24 March, 603 AD Gregorian) and then adds the Distance Number 10.11.10.5.8 to it, arriving at a date of 21 October 4772 AD, more than 4,000 years after Pakal's time. Another example is Stela 1 at Coba which marks the date of creation as 13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.13.0.0.0.0, or nineteen units above the b'ak'tun. According to Linda Schele, these 13s represent "the starting point of a huge odometer of time", with each acting as a zero and resetting to 1 as the numbers increase. Thus this inscription anticipates the current universe lasting at least 2021x13x360 days, or roughly 2.687x1028 years; a time span equal to 2 quintillion times the age of the universe as determined by cosmologists. Others have suggested, however, that this date marks creation as having occurred after that time span. In 2012, researchers announced the discovery of a series of Maya astronomical tables in Xultun, Guatemala which plot the movements of the Moon and other astronomical bodies over the course of 17 b'ak'tuns.
What was supposed to happen on that date?
A: this date marks creation as having occurred after that time span.
Some context: Callen Radcliffe "Cal" Tjader, Jr. ( CHAY-d@r; July 16, 1925 - May 5, 1982) was an American Latin jazz musician, known as the most successful non-Latino Latin musician. He explored other jazz idioms, even as he continued to perform the music of Cuba, the Caribbean, and Latin America for the rest of his life. Tjader played the vibraphone primarily. He was accomplished on the drums, bongos, congas, timpani, and the piano.
Tjader soon quit Shearing after a gig at the San Francisco jazz club the Blackhawk. In April 1954, he formed the Cal Tjader Modern Mambo Quintet. The members were brothers Manuel and Carlos Duran on piano and bass respectively, Bayardo "Benny" Velarde on timbales, bongos, and congas, and Edgard Rosales on congas (Luis Miranda replaced Rosales after the first year). Back in San Francisco and recording for Fantasy Records, the group produced several albums in rapid succession, including Mambo with Tjader. The Mambo craze reached its pitch in the late 1950s, a boon to Tjader's career. Unlike the exotica of Martin Denny and Les Baxter, music billed as "impressions of" Oceania (and other locales), Tjader's bands featured seasoned Cuban players and top-notch jazz talent conversant in both idioms. He cut several notable straight-ahead jazz albums for Fantasy using various group names, most notably the Cal Tjader Quartet (composed of bassist Gene Wright, drummer Al Torre, and pianist Vince Guaraldi). Tjader is sometimes lumped in as part of the West Coast (or "cool") jazz sound, although his rhythms and tempos (both Latin and bebop) had little in common with the work of Los Angeles jazzmen Gerry Mulligan, Chet Baker, or Art Pepper. Tjader and his band opened the second Monterey Jazz Festival in 1959 with an acclaimed "preview" concert. The first festival had suffered financially. Tjader is credited with bringing in big ticket sales for the second and saving the landmark festival before it had even really started. The Modern Mambo Quintet disbanded within a couple of years. Tjader formed several more small-combo bands, playing regularly at such San Francisco jazz clubs as the Blackhawk.
Who else was in the quartet?
A:
The members were brothers Manuel and Carlos Duran