| |
| R version 3.6.2 Patched (2020-02-12 r77795) -- "Dark and Stormy Night" |
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| Platform: x86_64-pc-linux-gnu (64-bit) |
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| |
| > #### Test R's (64-bit) date-time functions .. output tested *sloppily* |
| > |
| > ## R's internal fixes are used on 32-bit platforms. |
| > ## macOS gets these wrong: see HAVE_WORKING_64BIT_MKTIME |
| > |
| > Sys.setenv(TZ = "UTC") |
| > (z <- as.POSIXct("1848-01-01 12:00")) |
| [1] "1848-01-01 12:00:00 UTC" |
| > c(unclass(z)) |
| [1] -3849940800 |
| > (z <- as.POSIXct("2040-01-01 12:00")) |
| [1] "2040-01-01 12:00:00 UTC" |
| > c(unclass(z)) |
| [1] 2209032000 |
| > (z <- as.POSIXct("2040-07-01 12:00")) |
| [1] "2040-07-01 12:00:00 UTC" |
| > c(unclass(z)) |
| [1] 2224756800 |
| > |
| > Sys.setenv(TZ = "Europe/London") # pretty much portable. |
| > (z <- as.POSIXct("1848-01-01 12:00")) |
| [1] "1848-01-01 12:00:00 GMT" |
| > c(unclass(z)) |
| [1] -3849940800 |
| > ## We don't know the operation of timezones next year let alone in 2040 |
| > ## but these should at least round-trip |
| > ## These got the wrong timezone on Linux with glibc 2.2[67] |
| > as.POSIXct("2040-01-01 12:00") |
| [1] "2040-01-01 12:00:00 GMT" |
| > as.POSIXct("2040-07-01 12:00") |
| [1] "2040-07-01 12:00:00 BST" |
| > |
| > Sys.setenv(TZ = "EST5EDT") # also pretty much portable. |
| > (z <- as.POSIXct("1848-01-01 12:00")) |
| [1] "1848-01-01 12:00:00 EST" |
| > c(unclass(z)) |
| [1] -3849922800 |
| > ## see comment above |
| > as.POSIXct("2040-01-01 12:00") |
| [1] "2040-01-01 12:00:00 EST" |
| > as.POSIXct("2040-07-01 12:00") |
| [1] "2040-07-01 12:00:00 EDT" |
| > |
| > ## PR15613: had day as > 24hrs. |
| > as.POSIXlt(ISOdate(2071,1,13,0,0,tz="Etc/GMT-1"))$wday |
| [1] 2 |
| > as.POSIXlt(ISOdate(2071,1,13,0,1,tz="Etc/GMT-1"))$wday |
| [1] 2 |
| > |
| > |
| > ## Incorrect use of %b should work even though abbreviation does match |
| > old <- Sys.setlocale("LC_TIME", "C") # to be sure |
| > stopifnot(!is.na(strptime("11-August-1903", "%d-%b-%Y"))) |
| > |
