[R] Getting a particular weekday for a given month

Boris Steipe boris.steipe at utoronto.ca
Mon Apr 7 20:23:55 CEST 2014

Something like:

# the third Wednesday
m <- as.Date("2014-04-01")
format(m+which(format(m+0:30,"%a") == "Wed")[3]-1, "%a %b %d")

# or eg. all Tuesdays
format(m+which(format(m+0:30,"%a") == "Tue")-1, "%a %b %d")

# or eg. the last Friday
wd <- which(format(m+0:30,"%a") == "Fri")-1
format(m+wd[length(wd)], "%a %b %d")

Note: adding integers to your "Month" increments months, not days

On 2014-04-07, at 1:49 PM, Christofer Bogaso wrote:

> Hi,
> Given a month name, I am looking for some script to figure out, what is the
> date for 3rd Wednesday. For example let say I have following month:
> library(zoo)
> Month <- as.yearmon(as.Date(Sys.time()))
> I need to answer: What is the date for 3rd Wednesday of 'Month'?
> Really appreciate for any pointer.
> Thanks for your time.
> 	[[alternative HTML version deleted]]
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

More information about the R-help mailing list