x <- c("2010-04-14-04-35-59", "2010-04-01-12-00-00")
ymd_hms(x)
# [1] "2010-04-14 04:35:59 UTC" "2010-04-01 12:00:00 UTC"
y <- c("2011-12-31 12:59:59", "2010-01-01 12:00:00")
ymd_hms(y)
# [1] "2011-12-31 12:59:59 UTC" "2010-01-01 12:00:00 UTC"}
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