julian: Julian calendar dates

In calcal: Calendrical Calculations

Julian calendar dates

Description

The Julian calendar is the calendar used by the Roman Empire, and takes its name from Julius Caesar, who introduced it in 46 BC. It is still used as a religious calendar in parts of the Eastern Orthodox Church.

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

Value

A julian vector object

See Also

cal_julian

Examples

as_date("2016-01-01", calendar = cal_julian)
as_date(Sys.Date(), calendar = cal_julian)
tibble::tibble(
  x = seq(as.Date("2025-01-01"), as.Date("2025-12-31"), by = "day"),
  y = as_date(x, calendar = cal_gregorian),
  z = as_date(x, calendar = cal_julian)
)
new_date(year = 2025, month = 4, day = 19:30, calendar = cal_julian)
julian_date(2025, 4, 19:30)
as_julian("2016-01-01")
as_julian(Sys.Date())
tibble::tibble(
  x = seq(as.Date("2025-01-01"), as.Date("2025-12-31"), by = "day"),
  y = as_julian(x)
)

calcal documentation built on Feb. 25, 2026, 9:07 a.m.