force_tz does not recognize GMT

[Zhuk66]

Here is a short example:

library(lubridate)
x <- ydm_hm("2013-25-07 4:00am")
force_tz(x, "GMT")
Error in C_force_tz(to_posixct(time), tz, roll_dst) :
CCTZ: Unrecognized output timezone: "GMT"
7: (function ()
traceback(2))()
6: C_force_tz(to_posixct(time), tz, roll_dst)
5: from_posixct(C_force_tz(to_posixct(time), tz, roll_dst), time)
4: .force_tz(time, tz, tzout, roll_dst)
3: timechange::time_force_tz(time, tz = tzone, roll_dst = roll_dst)
2: force_tz.default(x, "GMT")
1: force_tz(x, "GMT")

The following calls to force_tz worked:

force_tz(x, "GMT+0")
[1] "2013-07-25 04:00:00 GMT"

force_tz(x, "America/New_York")
[1] "2013-07-25 04:00:00 EDT"

My session information:

sessionInfo()
R version 4.0.2 (2020-06-22)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Red Hat Enterprise Linux

Matrix products: default
BLAS: /opt/revr/ropen/4.0.2/lib64/R/lib/libRblas.so
LAPACK: /opt/revr/ropen/4.0.2/lib64/R/lib/libRlapack.so

locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
[3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8
[5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8
[7] LC_PAPER=en_US.UTF-8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] stats graphics grDevices utils datasets methods base

other attached packages:
[1] lubridate_1.9.2 timechange_0.2.0 purrr_1.0.1
[4] dplyr_1.1.1 pryr_0.1.6 devtools_2.4.5
[7] usethis_2.1.6 RevoUtilsMath_11.0.0

loaded via a namespace (and not attached):
[1] Rcpp_1.0.10 compiler_4.0.2 pillar_1.9.0
[4] later_1.3.0 urlchecker_1.0.1 prettyunits_1.1.1
[7] profvis_0.3.7 remotes_2.4.2 tools_4.0.2
[10] digest_0.6.31 pkgbuild_1.4.0 pkgload_1.3.2
[13] tibble_3.2.1 memoise_2.0.1 lifecycle_1.0.3
[16] pkgconfig_2.0.3 rlang_1.1.0 shiny_1.7.4
[19] cli_3.6.1 rstudioapi_0.14 fastmap_1.1.1
[22] stringr_1.5.0 generics_0.1.3 RevoUtils_11.0.2
[25] fs_1.6.1 vctrs_0.6.1 htmlwidgets_1.6.2
[28] tidyselect_1.2.0 glue_1.6.2 R6_2.5.1
[31] processx_3.8.0 fansi_1.0.4 sessioninfo_1.2.2
[34] callr_3.7.3 magrittr_2.0.3 ps_1.7.4
[37] promises_1.2.0.1 codetools_0.2-19 ellipsis_0.3.2
[40] htmltools_0.5.5 mime_0.12 xtable_1.8-4
[43] httpuv_1.6.3 utf8_1.2.3 stringi_1.7.12
[46] miniUI_0.1.1.1 cachem_1.0.7 crayon_1.5.2

Also:

Sys.getenv("TZDIR")
[1] "/usr/share/zoneinfo/"

[nviets]

Same issue here.

[vspinu]

Any reason why you are not using UTC instead?

[vspinu]

Could you devtools::install_github("vspinu/timechange") and try again? I have implemented a fallback for systems which don't have GMT in zoneinfo.