Julian calendar dates — julian

Create a Julian date object.

Usage

julian_date(year = integer(), month = integer(), day = integer())

as_julian(date, ...)

Arguments

year: A numeric vector of years
month: A numeric vector of months
day: A numeric vector of days
date: Vector of dates on some calendar
...: Additional arguments not currently used

Value

A julian vector object

Examples

julian_date(2025, 4, 19:30)
#> <julian[12]>
#>  [1] 2025-Apr-19 2025-Apr-20 2025-Apr-21 2025-Apr-22 2025-Apr-23 2025-Apr-24
#>  [7] 2025-Apr-25 2025-Apr-26 2025-Apr-27 2025-Apr-28 2025-Apr-29 2025-Apr-30
as_julian("2016-01-01")
#> <julian[1]>
#> [1] 2015-Dec-19
as_julian(Sys.Date())
#> <julian[1]>
#> [1] 2025-May-14
tibble::tibble(
  x = seq(as.Date("2025-01-01"), as.Date("2025-12-31"), by = "day"),
  y = as_gregorian(x),
  z = as_julian(x)
)
#> # A tibble: 365 × 3
#>    x                    y           z
#>    <date>           <Gre>       <Jul>
#>  1 2025-01-01 2025-Jan-01 2024-Dec-19
#>  2 2025-01-02 2025-Jan-02 2024-Dec-20
#>  3 2025-01-03 2025-Jan-03 2024-Dec-21
#>  4 2025-01-04 2025-Jan-04 2024-Dec-22
#>  5 2025-01-05 2025-Jan-05 2024-Dec-23
#>  6 2025-01-06 2025-Jan-06 2024-Dec-24
#>  7 2025-01-07 2025-Jan-07 2024-Dec-25
#>  8 2025-01-08 2025-Jan-08 2024-Dec-26
#>  9 2025-01-09 2025-Jan-09 2024-Dec-27
#> 10 2025-01-10 2025-Jan-10 2024-Dec-28
#> # ℹ 355 more rows