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To format Dates we use the format(date, format="%Y-%m-%d") function with either the POSIXct (given from as.POSIXct()) or POSIXlt (given from as.POSIXlt()) d = as.Date("2016-07-21") # Current Date Time Stamp format(d,"%a") # Abbreviated Weekday ## [1] &qu...

To coerce a variable to a date use the as.Date() function. > x <- as.Date("2016-8-23") > x [1] "2016-08-23" > class(x) [1] "Date" The as.Date() function allows you to provide a format argument. The default is %Y-%m-%d, which is Year-month-day. > ...

R contains a Date class, which is created with as.Date(), which takes a string or vector of strings, and if the date is not in ISO 8601 date format YYYY-MM-DD, a formatting string of strptime-style tokens. as.Date('2016-08-01') # in ISO format, so does not require formatting string ## [1] &quot...