[Disambiguator]

. . .remember the 'Harmonic Convergence' ??

Sounds vaguely familiar. 1970s again?

[Salgak]

1987.

https://en.wikipedia.org/wiki/Harmonic_Convergence

And a parody card in the “Illuminati: New World Order” card game of the late 1980s. . .

https://www.ebay.com/itm/134765503546