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richgillin/gist:f9f11699ffe7335d0eeccbad75252574

Created April 8, 2018 23:53
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18th birthday anomoly
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gistfile1.txt
a1 <- as.Date("1985-01-21")
a1 <- as.POSIXlt(a1)
a1$year <- a1$year+18; a1
## [1] "2003-01-21 UTC"
# with lubridate
library(lubridate)
a2 <- as_date("1985-01-21")
a_18 <- a2 + dyears(18); a_18
## [1] "2003-01-17"
## Four days difference between r-base (+Fei Teng) and tidyverse.
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