Floor date with timezone can be buggy

[ibiris]

lubridate::floor_date(lubridate::ymd("2016-03-31", tz="Europe/Helsinki") , unit="month")
returns [1] "2016-02-29 23:00:00 EET"
I expected this to return "2016-03-01 EET".

As a comparison
lubridate::floor_date(lubridate::ymd("2016-03-01", tz="Europe/Helsinki") , unit="month")
returns [1] "2016-03-01 EET"

and so do all dates between "2016-03-01" and "2016-03-27". The error seems to occur for

"2016-03-28"
"2016-03-29"
"2016-03-30"
"2016-03-31"

My session info
`R version 3.2.3 (2015-12-10)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 15.10

locale:
[1] LC_CTYPE=en_GB.UTF-8 LC_NUMERIC=C LC_TIME=fi_FI.UTF-8 LC_COLLATE=en_GB.UTF-8 LC_MONETARY=fi_FI.UTF-8
[6] LC_MESSAGES=en_GB.UTF-8 LC_PAPER=fi_FI.UTF-8 LC_NAME=C LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=fi_FI.UTF-8 LC_IDENTIFICATION=C

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

loaded via a namespace (and not attached):
[1] magrittr_1.5 tools_3.2.3 lubridate_1.5.0 stringi_1.0-1 stringr_1.0.0 radar_0.1`

[ibiris]

thanks @vspinu, I appreciate this fix!!