Compute UTC offset based on Time Zone and Date

Usage

TZ2UTC(DT, TZ = "local")

Arguments

DT: The date in the format as "2021-03-05"
TZ: The time zone when the recording started. Default = "local", which means user's local time zone

Value

A character string indicating the UTC offset, e.g., "UTC-05:00"

Examples


x <- as.Date (c ("2017-10-24", "2017-11-20"))
TZ2UTC (DT = x, TZ = "America/New_York") ## Expect two different UTCs
#> [1] "UTC-04:00" "UTC-05:00"

if (FALSE) { # \dontrun{
# A vector of dates
x <-
    seq.Date (
        from = as.Date ("2017-10-24"),
        to = as.Date ("2017-11-27"),
        by = "day"
    )

# If the user resides in a country that follows daylight saving time
TZ2UTC (DT = x, TZ = "local")

# If not
# TZ2UTC(DT = x, TZ = "America/New_York")
} # }