Nagios NRPE plugin check_file version 1.3 uses a very flexible format for specification of file age filters. Perl module Time::ParseDate is used for that purpose and following formats are supported:
Absolute date formats:
Dow, dd Mon yy
Dow, dd Mon yyyy
Dow, dd Mon
dd Mon yy
dd Mon yyyy
Month day{st,nd,rd,th}, year
Month day{st,nd,rd,th}
Mon dd yyyy
yyyy/mm/dd
yyyy/mm
mm/dd/yy
mm/dd/yyyy
mm/yy
yy/mm (only if year > 12, or > 31 if UK)
yy/mm/dd (only if year > 12 and day < 32, or year > 31 if UK)
dd/mm/yy (only if UK, or an invalid mm/dd/yy or yy/mm/dd)
dd/mm/yyyy (only if UK, or an invalid mm/dd/yyyy)
dd/mm (only if UK, or an invalid mm/dd)
Relative date formats:
count "days"
count "weeks"
count "months"
count "years"
Dow "after next"
Dow (requires PREFER_PAST or PREFER_FUTURE)
"next" Dow
"tomorrow"
"today"
"yesterday"
"last" dow
"last week"
"now"
"now" "+" count units
"now" "-" count units
"+" count units
"-" count units
count units "ago"
Absolute time formats:
hh:mm:ss[.ddd]
hh:mm
hh:mm[AP]M
hh[AP]M
hhmmss[[AP]M]
"noon"
"midnight"
Relative time formats:
count "minuts"
count "seconds"
count "hours"
"+" count units
"+" count
"-" count units
"-" count
count units "ago"
Timezone formats:
[+-]dddd
GMT[+-]d+
[+-]dddd (TZN)
TZN
Special formats:
[ d]d/Mon/yyyy:hh:mm:ss [[+-]dddd]
yy/mm/dd.hh:mm
