## create character vectors
dts = c("1989-09-28", "2001-01-15", "2004-08-30", "1990-02-09")
dts
## timeDate
GMT = timeDate(dts, zone = "GMT", FinCenter = "GMT")
GMT
## diff
# suitably lagged and iterated differences
difftimeDate(GMT[1:2], GMT[-(1:2)])
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