استاندارد آن به این صورت است:
و این NumericDate به نحو زیر باید تعریف شود (Section 2. Terminology):
نمونهی استفادهی از آن در متد getAccessTokenExpirationDateUtc ارائه شدهاست.
Its value MUST be a number containing a NumericDate value.
A JSON numeric value representing the number of seconds from 1970-01-01T00:00:00Z UTC until the specified UTC date/time, ignoring leap seconds. This is equivalent to the IEEE Std 1003.1, 2013 Edition [POSIX.1] definition "Seconds Since the Epoch", in which each day is accounted for by exactly 86400 seconds, other than that non-integer values can be represented. See RFC 3339 [RFC3339] for details regarding date/times in general and UTC in particular.