"A metric calendar, clock and religion were instituted by the French Revolutionary Government but were soon deemed impractical (or, in the case of the religion, ridiculous) and were quickly dropped. They are no longer considered part of the Metric system."

Merde, je ne savais même pas que le système métrique était la norme officielle en Angleterre.
(et pour les abbréviations, d´un côté je le sais plus ou moins, moins que plus, et de l´autre je m´en carre)