lubridate and ISO8601

test.R

library(lubridate)

dates = c('2014-08-14T12:00:00+01:00',
          '2014-08-14T14:46:34',
          '2014-08-14T14:46:34.876',
          '2014-08-14T14:46:34Z',
          '2014-08-14T14:46:34-05:00',
          '2014-08-14T14:46:34Z')
print(paste('Given', paste(dates, collapse=', ')))

posixDates = ymd_hms(dates)
print(paste('Parsed as', paste(posixDates, collapse=', ')))

secondsFromEpoch = as.numeric(posixDates)
print(paste('Can get seconds, not sure how to get ms', paste(secondsFromEpoch, collapse=', ')))

formatter = stamp('2013-01-01T06:00:00Z', quiet=T)
backToDates = formatter(as.POSIXct(secondsFromEpoch, origin='1970-01-01'))
print(paste('And converted back', paste(backToDates, collapse=', ')))