Make Dealing with Dates a Little Easier

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Documentation for package ‘lubridate’ version 1.9.3

• DESCRIPTION file.
• User guides, package vignettes and other documentation.
• Package NEWS.

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A C D E F G H I L M N O P Q R S T U W Y misc

-- A --

add_with_rollback	Add and subtract months to a date without exceeding the last day of the new month
am	Does date time occur in the am or pm?
as.duration	Change an object to a duration
as.duration-method	Change an object to a duration
as.interval	Change an object to an 'interval'
as.interval-method	Change an object to an 'interval'
as.period	Change an object to a period
as.period-method	Change an object to a period
as_date	Convert an object to a date or date-time
as_date-method	Convert an object to a date or date-time
as_datetime	Convert an object to a date or date-time
as_datetime-method	Convert an object to a date or date-time

-- C --

ceiling_date	Round, floor and ceiling methods for date-time objects
cyclic_encoding	Cyclic encoding of date-times

-- D --

Date	Various date utilities
date	Get/set date component of a date-time
date<-	Get/set date component of a date-time
DateTimeUpdate	Changes the components of a date object
date_decimal	Converts a decimal to a date
day	Get/set days component of a date-time
day<-	Get/set days component of a date-time
days	Create or parse period objects
days_in_month	Get the number of days in the month of a date-time
ddays	Create a duration object.
decimal_date	Converts a date to a decimal of its year
dhours	Create a duration object.
dmicroseconds	Create a duration object.
dmilliseconds	Create a duration object.
dminutes	Create a duration object.
dmonths	Create a duration object.
dmy	Parse dates with *y*ear, *m*onth, and *d*ay components
dmy_h	Parse date-times with *y*ear, *m*onth, and *d*ay, *h*our, *m*inute, and *s*econd components.
dmy_hm	Parse date-times with *y*ear, *m*onth, and *d*ay, *h*our, *m*inute, and *s*econd components.
dmy_hms	Parse date-times with *y*ear, *m*onth, and *d*ay, *h*our, *m*inute, and *s*econd components.
dnanoseconds	Create a duration object.
dpicoseconds	Create a duration object.
dseconds	Create a duration object.
dst	Get *d*aylight *s*avings *t*ime indicator of a date-time
duration	Create a duration object.
Duration-class	Duration class
durations	Duration class
dweeks	Create a duration object.
dyears	Create a duration object.
dym	Parse dates with *y*ear, *m*onth, and *d*ay components

-- E --

epiweek	Get/set weeks component of a date-time
epiyear	Get/set years component of a date-time

-- F --

fast_strptime	User friendly date-time parsing functions
fit_to_timeline	Fit a POSIXlt date-time to the timeline
floor_date	Round, floor and ceiling methods for date-time objects
force_tz	Replace time zone to create new date-time
force_tz.default	Replace time zone to create new date-time
force_tzs	Replace time zone to create new date-time
format_ISO8601	Format in ISO8601 character format
format_ISO8601-method	Format in ISO8601 character format

-- G --

guess_formats

Guess possible date-times formats from a character vector

-- H --

hm	Parse periods with *h*our, *m*inute, and *s*econd components
hms	Parse periods with *h*our, *m*inute, and *s*econd components
hour	Get/set hours component of a date-time
hour<-	Get/set hours component of a date-time
hours	Create or parse period objects

-- I --

instant	Is x a date-time object?
instants	Is x a date-time object?
interval	Utilities for creation and manipulation of 'Interval' objects
Interval-class	Interval class
intervals	Interval class
int_aligns	Utilities for creation and manipulation of 'Interval' objects
int_diff	Utilities for creation and manipulation of 'Interval' objects
int_end	Utilities for creation and manipulation of 'Interval' objects
int_end<-	Utilities for creation and manipulation of 'Interval' objects
int_flip	Utilities for creation and manipulation of 'Interval' objects
int_length	Utilities for creation and manipulation of 'Interval' objects
int_overlaps	Utilities for creation and manipulation of 'Interval' objects
int_shift	Utilities for creation and manipulation of 'Interval' objects
int_standardize	Utilities for creation and manipulation of 'Interval' objects
int_start	Utilities for creation and manipulation of 'Interval' objects
int_start<-	Utilities for creation and manipulation of 'Interval' objects
is.Date	Various date utilities
is.difftime	Is x a difftime object?
is.duration	Create a duration object.
is.instant	Is x a date-time object?
is.interval	Utilities for creation and manipulation of 'Interval' objects
is.period	Create or parse period objects
is.POSIXct	Various POSIX utilities
is.POSIXlt	Various POSIX utilities
is.POSIXt	Various POSIX utilities
is.timepoint	Is x a date-time object?
is.timespan	Is x a length of time?
isoweek	Get/set weeks component of a date-time
isoyear	Get/set years component of a date-time

-- L --

lakers	Lakers 2008-2009 basketball data set
leap_year	Is a year a leap year?
local_time	Get local time from a date-time vector.

-- M --

m+	Add and subtract months to a date without exceeding the last day of the new month
m-	Add and subtract months to a date without exceeding the last day of the new month
make_date	Efficient creation of date-times from numeric representations
make_datetime	Efficient creation of date-times from numeric representations
make_difftime	Create a difftime object.
mday	Get/set days component of a date-time
mday<-	Get/set days component of a date-time
mdy	Parse dates with *y*ear, *m*onth, and *d*ay components
mdy_h	Parse date-times with *y*ear, *m*onth, and *d*ay, *h*our, *m*inute, and *s*econd components.
mdy_hm	Parse date-times with *y*ear, *m*onth, and *d*ay, *h*our, *m*inute, and *s*econd components.
mdy_hms	Parse date-times with *y*ear, *m*onth, and *d*ay, *h*our, *m*inute, and *s*econd components.
microseconds	Create or parse period objects
milliseconds	Create or parse period objects
minute	Get/set minutes component of a date-time
minute<-	Get/set minutes component of a date-time
minutes	Create or parse period objects
month	Get/set months component of a date-time
month<-	Get/set months component of a date-time
months.numeric	Create or parse period objects
ms	Parse periods with *h*our, *m*inute, and *s*econd components
my	Parse dates with *y*ear, *m*onth, and *d*ay components
myd	Parse dates with *y*ear, *m*onth, and *d*ay components

-- N --

nanoseconds	Create or parse period objects
NA_Date_	Various date utilities
NA_POSIXct_	Various POSIX utilities
now	The current day and time

-- O --

origin

1970-01-01 UTC

-- P --

parse_date_time	User friendly date-time parsing functions
parse_date_time2	User friendly date-time parsing functions
period	Create or parse period objects
periods	Create or parse period objects
period_to_seconds	Contrive a period to/from a given number of seconds
picoseconds	Create or parse period objects
pm	Does date time occur in the am or pm?
POSIXct	Various POSIX utilities
pretty_dates	Computes attractive axis breaks for date-time data

-- Q --

qday	Get/set days component of a date-time
qday<-	Get/set days component of a date-time
quarter	Get the fiscal quarter and semester of a date-time

-- R --

rollback	Roll backward or forward a date the previous, current or next month
rollbackward	Roll backward or forward a date the previous, current or next month
rollforward	Roll backward or forward a date the previous, current or next month
round_date	Round, floor and ceiling methods for date-time objects

-- S --

second	Get/set seconds component of a date-time
second<-	Get/set seconds component of a date-time
seconds	Create or parse period objects
seconds_to_period	Contrive a period to/from a given number of seconds
semester	Get the fiscal quarter and semester of a date-time
stamp	Format dates and times based on human-friendly templates
stamp_date	Format dates and times based on human-friendly templates
stamp_time	Format dates and times based on human-friendly templates

-- T --

timespan	Description of time span classes in lubridate
timespans	Description of time span classes in lubridate
time_length	Compute the exact length of a time span
time_length-method	Compute the exact length of a time span
today	The current day and time
tz	Get/set time zone component of a date-time
tz<-	Get/set time zone component of a date-time

-- U --

update.POSIXt

Changes the components of a date object

-- W --

wday	Get/set days component of a date-time
wday<-	Get/set days component of a date-time
week	Get/set weeks component of a date-time
week<-	Get/set weeks component of a date-time
weeks	Create or parse period objects
with_tz	Get date-time in a different time zone
with_tz.default	Get date-time in a different time zone

-- Y --

yday	Get/set days component of a date-time
yday<-	Get/set days component of a date-time
ydm	Parse dates with *y*ear, *m*onth, and *d*ay components
ydm_h	Parse date-times with *y*ear, *m*onth, and *d*ay, *h*our, *m*inute, and *s*econd components.
ydm_hm	Parse date-times with *y*ear, *m*onth, and *d*ay, *h*our, *m*inute, and *s*econd components.
ydm_hms	Parse date-times with *y*ear, *m*onth, and *d*ay, *h*our, *m*inute, and *s*econd components.
year	Get/set years component of a date-time
year<-	Get/set years component of a date-time
years	Create or parse period objects
ym	Parse dates with *y*ear, *m*onth, and *d*ay components
ymd	Parse dates with *y*ear, *m*onth, and *d*ay components
ymd_h	Parse date-times with *y*ear, *m*onth, and *d*ay, *h*our, *m*inute, and *s*econd components.
ymd_hm	Parse date-times with *y*ear, *m*onth, and *d*ay, *h*our, *m*inute, and *s*econd components.
ymd_hms	Parse date-times with *y*ear, *m*onth, and *d*ay, *h*our, *m*inute, and *s*econd components.
yq	Parse dates with *y*ear, *m*onth, and *d*ay components

-- misc --

%--%	Utilities for creation and manipulation of 'Interval' objects
%m+%	Add and subtract months to a date without exceeding the last day of the new month
%m+%-method	Add and subtract months to a date without exceeding the last day of the new month
%m-%	Add and subtract months to a date without exceeding the last day of the new month
%m-%-method	Add and subtract months to a date without exceeding the last day of the new month
%within%	Does a date (or interval) fall within an interval?
%within%-method	Does a date (or interval) fall within an interval?