Make Dealing with Dates a Little Easier

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Documentation for package ‘lubridate’ version 1.7.9

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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_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
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 back date to last day of previous 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

-- 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
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?