(tar.info)General date syntax
General date syntax
A "date" is a string, possibly empty, containing many items
separated by whitespace. The whitespace may be omitted when no
ambiguity arises. The empty string means the beginning of today (i.e.,
midnight). Order of the items is immaterial. A date string may contain
many flavors of items:
* calendar date items
* time of the day items
* time zone items
* day of the week items
* relative items
* pure numbers.
We describe each of these item types in turn, below.
A few numbers may be written out in words in most contexts. This is
most useful for specifying day of the week items or relative items (see
below). Here is the list: `first' for 1, `next' for 2, `third' for 3,
`fourth' for 4, `fifth' for 5, `sixth' for 6, `seventh' for 7, `eighth'
for 8, `ninth' for 9, `tenth' for 10, `eleventh' for 11 and `twelfth'
for 12. Also, `last' means exactly -1.
When a month is written this way, it is still considered to be
written numerically, instead of being "spelled in full"; this changes
the allowed strings.
Alphabetic case is completely ignored in dates. Comments may be
introduced between round parentheses, as long as included parentheses
are properly nested. Hyphens not followed by a digit are currently
ignored. Leading zeros on numbers are ignored.
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