nanotime (version 0.3.10)

nano_wday: Get a component of a date time

Description

Get a component of a date time. nano_wday returns the numeric position in a week, with Sunday == 0. nano_mday returns the numeric day (i.e. a value from 1 to 31). nano_month returns the month (i.e. a value from 1 to 12). nano_year returns the year.

Usage

nano_wday(x, tz)
nano_mday(x, tz)
nano_month(x, tz)
nano_year(x, tz)

Arguments

x

a nanotime object

tz

character a string representing a timezone

Details

Note that the tz parameter is mandatory because the day boundary is different depending on the time zone and nanotime does not store the timezone as it is just an offset in nanoseconds from the epoch.

Examples

if (FALSE) {
nano_wday(as.nanotime("2020-03-14 23:32:00-04:00"), "America/New_York")
nano_wday(as.nanotime("2020-03-14 23:32:00 America/New_York"), "Europe/Paris")
nano_mday(as.nanotime("2020-03-14 23:32:00-04:00"), "America/New_York")
nano_mday(as.nanotime("2020-03-14 23:32:00 America/New_York"), "Europe/Paris")
nano_month(as.nanotime("2020-12-31 23:32:00-04:00"), "America/New_York")
nano_month(as.nanotime("2020-12-31 23:32:00 America/New_York"), "Europe/Paris")
nano_year(as.nanotime("2020-12-31 23:32:00-04:00"), "America/New_York")
nano_year(as.nanotime("2020-12-31 23:32:00 America/New_York"), "Europe/Paris")
}