timeDate (version 4041.110)

firstDay: First and last days

Description

Computes the first/last day in a given month/quarter.

Usage

timeFirstDayInMonth(charvec, format = "%Y-%m-%d", zone = "", 
    FinCenter = "")
timeLastDayInMonth(charvec, format = "%Y-%m-%d", zone = "", 
    FinCenter = "")
timeFirstDayInQuarter(charvec, format = "%Y-%m-%d", zone = "", 
    FinCenter = "")
timeLastDayInQuarter(charvec, format = "%Y-%m-%d", zone = "", 
    FinCenter = "")

Value

an object of class "timeDate"

Arguments

charvec

a character vector of dates and times.

format

the format specification of the input character vector.

zone

the time zone or financial center where the data were recorded.

FinCenter

a character with the location of the financial center named as "continent/city".

Details

The functions timeLastDayInMonth and timeLastDayInMonth return the last or first day, respectively, in a given month and year.

The same functionality for quarterly time horizons is returned by the functions timeLastDayInQuarter and timeLastDayInQuarter.

Examples

## date as character string
charvec = "2006-04-16"
myFinCenter = getRmetricsOptions("myFinCenter")

## timeLastDayInMonth
# What date has the last day in a month for a given date?
timeLastDayInMonth(charvec, format = "%Y-%m-%d", 
  zone = myFinCenter, FinCenter = myFinCenter)
timeLastDayInMonth(charvec)
timeLastDayInMonth(charvec, FinCenter = "Zurich")
   
## timeFirstDayInMonth
# What date has the first day in a month for a given date?
timeFirstDayInMonth(charvec)
    
## timeLastDayInQuarter
# What date has the last day in a quarter for a given date?
timeLastDayInQuarter(charvec)
    
## timeFirstDayInQuarter
# What date has the first day in a quarter for a given date?
timeFirstDayInQuarter(charvec)
    
## timeNdayOnOrAfter
# What date has the first Monday on or after March 15, 1986?
timeNdayOnOrAfter("1986-03-15", 1)
    
## timeNdayOnOrBefore
# What date has Friday on or before April 22, 1977?
timeNdayOnOrBefore("1986-03-15", 5)
    
## timeNthNdayInMonth
# What date is the second Monday in April 2004?
timeNthNdayInMonth("2004-04-01", 1, 2)
    
## timeLastNdayInMonth
# What date has the last Tuesday in May, 1996?
timeLastNdayInMonth("1996-05-01", 2)