Dates in R

Parsing, formatting, and doing arithmetic on dates.

start <- as.Date("2026-07-01")
end <- as.Date("2026-07-29")

gap <- as.numeric(end - start)
week_later <- start + 7
sequence <- seq(start, end, by = "week")

label <- format(end, "%d %B %Y")
year <- format(end, "%Y")
weekday <- weekdays(end)
parsed <- as.Date("29/07/2026", format = "%d/%m/%Y")

How it works

1. as.Date parses ISO text, or any format.
2. Subtracting dates gives a difference in days.
3. format and weekdays render parts for display.

Keywords and builtins used here

• format
• seq
• weekdays

The run, in numbers

Lines

11

Characters to type

294

Tokens

76

Three-star pace

95 tpm

At the three-star pace of 95 tokens a minute, this run takes about 48 seconds.

Type this snippet

Step 2 of 3 in Text & dates, step 18 of 20 in Language basics.

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Dates in other languages

• Python