year_month_day() constructs the most common calendar type using the Gregorian year, month, day, and time of day components.

year_month_day(
  year,
  month = NULL,
  day = NULL,
  hour = NULL,
  minute = NULL,
  second = NULL,
  subsecond = NULL,
  ...,
  subsecond_precision = NULL
)

Arguments

year

[integer]

The year. Values [-32767, 32767] are generally allowed.

month

[integer / NULL]

The month. Values [1, 12] are allowed.

day

[integer / "last" / NULL]

The day of the month. Values [1, 31] are allowed.

If "last", then the last day of the month is returned.

hour

[integer / NULL]

The hour. Values [0, 23] are allowed.

minute

[integer / NULL]

The minute. Values [0, 59] are allowed.

second

[integer / NULL]

The second. Values [0, 59] are allowed.

subsecond

[integer / NULL]

The subsecond. If specified, subsecond_precision must also be specified to determine how to interpret the subsecond.

If using milliseconds, values [0, 999] are allowed.

If using microseconds, values [0, 999999] are allowed.

If using nanoseconds, values [0, 999999999] are allowed.

...

These dots are for future extensions and must be empty.

subsecond_precision

[character(1) / NULL]

The precision to interpret subsecond as. One of: "millisecond", "microsecond", or "nanosecond".

Value

A year-month-day calendar vector.

Details

Fields are recycled against each other.

Fields are collected in order until the first NULL field is located. No fields after the first NULL field are used.

Examples

# Just the year x <- year_month_day(2019:2025) # Year-month type year_month_day(2020, 1:12)
#> <year_month_day<month>[12]> #> [1] "2020-01" "2020-02" "2020-03" "2020-04" "2020-05" "2020-06" "2020-07" #> [8] "2020-08" "2020-09" "2020-10" "2020-11" "2020-12"
# The most common use case involves year, month, and day fields x <- year_month_day(2020, clock_months$january, 1:5) x
#> <year_month_day<day>[5]> #> [1] "2020-01-01" "2020-01-02" "2020-01-03" "2020-01-04" "2020-01-05"
# Precision can go all the way out to nanosecond year_month_day(2019, 1, 2, 2, 40, 45, 200, subsecond_precision = "nanosecond")
#> <year_month_day<nanosecond>[1]> #> [1] "2019-01-02 02:40:45.000000200"