(Time conversion specifiers, Options for date):

(Time conversion specifiers, Options for date):
Document date --rfc-3339 and new specifiers %:z, %::z, %:::z.  Use
"date and time" consistently; the old version sometimes said "time
and date".  Fix a minor bug in the documentation for --rfc-2822:
it claimed day-of-month < 10 had leading space, not leading zero.
Use a consistent format for terms like "RFC".