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1) The author does. Z means UTC. 2) The JS Date type has a "toISOString" function that emits an ISO date time string like the ones used in the examples. Since

by pluma 10y ago

1) The author does. Z means UTC. 2) The JS Date type has a "toISOString" function that emits an ISO date time string like the ones used in the examples. Since everything else is already based on what JS does, why not just move that behaviour into the JSON spec as well?