bug adding days to POSIXct object in version 1.7.2 #643
Description
Using lubridate version 1.7.2 I have encountered the following behaviour when adding one day to a POSIXct object:
as.POSIXct("2017-07-01", format = "%Y-%m-%d") + days(1)
# [1] "2017-06-02 02:00:00 CEST"
The month is changed from july to june. This only happens when certain other packages are loaded (e.g. rgdal), and it doesn't happen every time you execute it (?):
library(lubridate)
library(rgdal)
as.POSIXct("2017-07-01", format = "%Y-%m-%d") + days(1)
as.POSIXct("2017-07-01", format = "%Y-%m-%d") + days(1)
# [1] "2017-07-02 CEST"
# [1] "2017-06-02 02:00:00 CEST"
It also doesn't happen with all dates, some dates seem to work fine (e.g. "2017-07-02")
as.POSIXct("2017-07-02", format = "%Y-%m-%d") + days(1)
# [1] "2017-07-03 02:00:00 CEST"
and seems to work when specifying a time zone:
as.POSIXct("2017-07-01", format = "%Y-%m-%d", tz = "CET") + days(1)
# [1] "2017-07-02 CEST"
Here is my session info:
R version 3.4.3 (2017-11-30)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1
Matrix products: default
locale:
[1] LC_COLLATE=German_Germany.1252 LC_CTYPE=German_Germany.1252
[3] LC_MONETARY=German_Germany.1252 LC_NUMERIC=C
[5] LC_TIME=German_Germany.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] rgdal_1.2-16 sp_1.2-7 lubridate_1.7.2 rj_2.1.0-13
loaded via a namespace (and not attached):
[1] compiler_3.4.3 magrittr_1.5 tools_3.4.3 rj.gd_2.1.0-2
[5] Rcpp_0.12.15 stringi_1.1.6 grid_3.4.3 stringr_1.2.0
[9] lattice_0.20-35