Convert local date to UTC in R
1 answer
If you want to convert datetime from the current timezone to UTC, you need to import in your timezone and then just change the display timezone to "UTC". for example: in Australian EST I am UTC + 10.
out <- as.POSIXct("12/31/2014 6:42:52 PM", format="%m/%d/%Y %H:%M:%S")
out
#"2014-12-31 06:42:52 EST"
#(Australian Eastern Standard Time)
as.numeric(out)
#[1] 1419972172
Now change the timezone for display purposes:
attr(out, "tzone") <- "UTC"
out
#[1] "2014-12-30 20:42:52 UTC"
# display goes 10 hours backwards as I'm UTC+10
as.numeric(out)
#[1] 1419972172
Note that this does not affect the underlying numeric data (seconds since 1970-01-01), it only changes what is displayed.
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