use Time::Piece;
my $t = localtime;
print "Time is $t\n";
print "Year is ", $t->year, "\n"; 用法:
$t->sec # also available as $t->second
$t->min # also available as $t->minute
$t->hour # 24 hour
$t->mday # also available as $t->day_of_month
$t->mon # 1 = January
$t->_mon # 0 = January
$t->monname # Feb
$t->month # same as $t->monname
$t->fullmonth # February
$t->year # based at 0 (year 0 AD is, of course 1 BC)
$t->_year # year minus 1900
$t->yy # 2 digit year
$t->wday # 1 = Sunday
$t->_wday # 0 = Sunday
$t->day_of_week # 0 = Sunday
$t->wdayname # Tue
$t->day # same as wdayname
$t->fullday # Tuesday
$t->yday # also available as $t->day_of_year, 0 = Jan 01
$t->isdst # also available as $t->daylight_savings
$t->hms # 12:34:56
$t->hms(".") # 12.34.56
$t->time # same as $t->hms
$t->ymd # 2000-02-29
$t->date # same as $t->ymd
$t->mdy # 02-29-2000
$t->mdy("/") # 02/29/2000
$t->dmy # 29-02-2000
$t->dmy(".") # 29.02.2000
$t->datetime # 2000-02-29T12:34:56 (ISO 8601)
$t->cdate # Tue Feb 29 12:34:56 2000
"$t" # same as $t->cdate
$t->epoch # seconds since the epoch
$t->tzoffset # timezone offset in a Time::Seconds object
$t->julian_day # number of days since Julian period began
$t->mjd # modified Julian date (JD-2400000.5 days)
$t->week # week number (ISO 8601)
$t->is_leap_year # true if it its
$t->month_last_day # 28-31
$t->time_separator($s) # set the default separator (default ":")
$t->date_separator($s) # set the default separator (default "-")
$t->day_list(@days) # set the default weekdays
$t->mon_list(@days) # set the default months
$t->strftime(FORMAT) # same as POSIX::strftime (without the overhead
# of the full POSIX extension)
$t->strftime() # "Tue, 29 Feb 2000 12:34:56 GMT"
Time::Piece->strptime(STRING, FORMAT)
# see strptime man page. Creates a new
# Time::Piece object 日期计算:
简单日期加减
use Time::Seconds;
my $seconds = $t1 - $t2;
$t1 += ONE_DAY; # add 1 day (constant from Time::Seconds)
下列的算是是有效的($t1 and $t2 是Time::Piece objects)
my $val = Time::Seconds->new(SECONDS)
$val->seconds;
$val->minutes;
$val->hours;
$val->days;
$val->weeks;
$val->months;
$val->financial_months; # 30 days
$val->years;
$val->pretty; # gives English representation of the delta 附录二：转义符说明：
%A is replaced by national representation of the full weekday name.
%a is replaced by national representation of the abbreviated weekday
name.
%B is replaced by national representation of the full month name.
%b is replaced by national representation of the abbreviated month
name.
%C is replaced by (year / 100) as decimal number; single digits are
preceded by a zero.
%c is replaced by national representation of time and date.
%D is equivalent to ``%m/%d/%y''.
%d is replaced by the day of the month as a decimal number (01-31).
%E* %O*
POSIX locale extensions. The sequences %Ec %EC %Ex %EX %Ey %EY %Od
%Oe %OH %OI %Om %OM %OS %Ou %OU %OV %Ow %OW %Oy are supposed to
provide alternate representations.
Additionally %OB implemented to represent alternative months names
(used standalone, without day mentioned).
%e is replaced by the day of the month as a decimal number (1-31);
single digits are preceded by a blank.
%F is equivalent to ``%Y-%m-%d''.
%G is replaced by a year as a decimal number with century. This year
is the one that contains the greater part of the week (Monday as
the first day of the week).
%g is replaced by the same year as in ``%G'', but as a decimal number
without century (00-99).
%H is replaced by the hour (24-hour clock) as a decimal number
(00-23).
%h the same as %b.
%I is replaced by the hour (12-hour clock) as a decimal number
(01-12).
%j is replaced by the day of the year as a decimal number (001-366).
%k is replaced by the hour (24-hour clock) as a decimal number (0-23);
single digits are preceded by a blank.
%l is replaced by the hour (12-hour clock) as a decimal number (1-12);
single digits are preceded by a blank.
%M is replaced by the minute as a decimal number (00-59).
%m is replaced by the month as a decimal number (01-12).
%n is replaced by a newline.
%O* the same as %E*.
%p is replaced by national representation of either "ante meridiem"
(a.m.) or "post meridiem" (p.m.) as appropriate.
%R is equivalent to ``%H:%M''.
%r is equivalent to ``%I:%M:%S %p''.
%S is replaced by the second as a decimal number (00-60).
%s is replaced by the number of seconds since the Epoch, UTC (see
mktime(3)).
%T is equivalent to ``%H:%M:%S''.
%t is replaced by a tab.
%U is replaced by the week number of the year (Sunday as the first day
of the week) as a decimal number (00-53).
%u is replaced by the weekday (Monday as the first day of the week) as
a decimal number (1-7).
%V is replaced by the week number of the year (Monday as the first day
of the week) as a decimal number (01-53). If the week containing
January 1 has four or more days in the new year, then it is week 1;
otherwise it is the last week of the previous year, and the next
week is week 1.
%v is equivalent to ``%e-%b-%Y''.
%W is replaced by the week number of the year (Monday as the first day
of the week) as a decimal number (00-53).
%w is replaced by the weekday (Sunday as the first day of the week) as
a decimal number (0-6).
%X is replaced by national representation of the time.
%x is replaced by national representation of the date.
%Y is replaced by the year with century as a decimal number.
%y is replaced by the year without century as a decimal number
(00-99).
%Z is replaced by the time zone name.
%z is replaced by the time zone offset from UTC; a leading plus sign
stands for east of UTC, a minus sign for west of UTC, hours and
minutes follow with two digits each and no delimiter between them
(common form for RFC 822 date headers).
%+ is replaced by national representation of the date and time (the
format is similar to that produced by date(1)).
%-* GNU libc extension. Do not do any padding when performing numeri-
cal outputs.
%_* GNU libc extension. Explicitly specify space for padding.
%0* GNU libc extension. Explicitly specify zero for padding.
%% is replaced by '%'.
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